I appreciate your coments and I think on the surface most people would agree - but it is because we have the benefit of hindsight - by the 1920's George was sitting on the most stable throne in Europe and we knew of the horrific fate of many of the Romanov family who hadn't escaped Russia, George may have had an inkling that Nicholas and Alexandra were in a dangerous position in 1917 when he expressed his concerns over the government's decision to offer asylum but he couldn't have foreseen the Bolshevik revolution of October - he wasn't a very forward thinking individual.
The British offer was made by the UK Government of Lloyd George AT THE REQUEST of the Provisional Government - Lloyd George believed that he was acting in the best interests of the allies and the King, who had already expressed his concerns, and it was motivated by his view that the Provisional Government was committed to the war - which was a naive hope when you consider the massive anti war demonstrations in Petrograd when news of the foreign ministers letter to the allied governments about their commitment to the war was leaked.
Most allied governments welcomed the Czar's abdication - his poor credentials to the "liberal" governments of Western Europe as a "despot" had been compounded as he failed to control his rapidly collapsing government. (they never really understood how much the war was contributing to that of course). Ironically the Republican French press was kinder to him after his fall than the British. Though the French didn't rush forward to offer asylum very much - though it was suggested at one point later in 1917 before the Bolshevik's took control.
Britain was fiercely anti Russian throughout the 19th Century - despite the personal family ties between the two royal families - British politicians had a notoriously anti russian streak - mainly because Russia was seen as a threat to British interests in the Eastern Med and to her Indian Empire many welcomed the collapse of the Russian Empire because it removed a stumbling block to Britain's imperial interests. That made the offer of sanctuary politically even more sensitive.
In addition to that In Britain in 1917 George V was facing a press and left wing politicians that widely welcomed his cousin's abdication - the Labour Party and the trade unions were celebrating the fall of "bloody Nicholas" and his "german Empress" and were protesting at any offer of asylum - in fact the Coalition Government had to deny that any offer had been made in Parliament. The timing was appalling for George on a personal level - he and his government were aware that events in Russia had given hope to numerous groups in the UK who wanted to see more radical change in British political and social life. Because the British Throne is always seen as relatively safe we tend to assume that George might have worried unnecessarily about the threat to his own position of being too closely linked to his cousin but he had to do so.
Kerensky's own comments on the offer made in exile have always had the air of a man equally keen to absolve himself of any guilt for their ultimate fate preferring instead to blame Lloyd George and George V. If he'd been that desperate he could have sent them to Finland where they could have. To be fair he was also desperate for his "glorious february" revolution to be seen as a bloodless democratic change - the Czar's survival was linked to that too.
The first mention of asylum is an enquiry to British Government from the Russian Foreign Minister on the 18th March 1917, Kings telegram offering asylum went on the 21st,war cabinet approval was made on 22nd, 23 March Telegram concerning the provisional invitation to the Tsar to come to England, 24 March Telegram concerning request to Russian government to give Tsar safe conduct for departure to England, 26th March Foreign Office learnt that King's telegram not delivered to Tsar through fear of misinterpretation, 28th March thanks conveyed from Russian Minister of Foreign Affairs at being asked to cancel King's telegram.
Letters from the King expressing concern at the invitation begin at the end of March by the 17th April he was expressing a strong view the invitation to the Czar Not be taken up, by the 22nd of April there is relief from the King that the offer has been dropped. All the King's comments were based on public opinion despite his own strong and warm personal feelings for the ex Czar.
Lets also remember that the Provisional Government were also under pressure to keep Nicholas in Russia as Maurice Paleologue noted in his diary...
Saturday, March 24, 1917.
The Soviet has heard that the King of England is offering the Emperor and Empress the hospitality of British territory. At the bidding of the "Maximalists" the Provisional Government has had to pledge its word to keep the fallen sovereigns in Russia. The Soviet has gone further and appointed a commissary to "supervise the detention of the imperial family."
The Czar's family went to the Urals in August 1917 on Kerensky's orders to try and ensure their safety (or so he always maintained)
- in April and May 1918 the family are moved to Ekaterinburg where they were killed in the July.
After the October Revolution there are a couple of interesting suggestions that the British Government did instruct its agents to look at ways of freeing the Imperial Family amongst the papers and letters of some agents - some appear fallacy but some do appear to have the ring of truth about them. I think that issue is open to further exploration.
George V was a constitutional or more correctly a parliamentary monarch (something incidentally derided by both his autocratic cousins Nicholas II and William of Germany). He decided in 1917 without the benefit of hindsight to stick to his own coronation oath and put the safety of his own country and own throne before any other personal considerations. Its that decision that lead him in the same year to reject his german names and titles and also more reluctantly to sign the Titles Deprivation Act which he personally wasn't that happy about.
You said he should have sent a strong message to the Bolsheviks - what though - invade? - the british army was so overstretched when they did intervene after the Germans signed peace with the Bolsheviks - that very few British Troops landed in Russia during the early civil war. Far more French, and American troops arrived in the july august of 1918. And the Allied Military intervention in the Russian situation (largely over concerns about allied supplies sent to the Russians falling into German hands) didn't begin until the July of 1918 which was really too late to have aided the Imperial Family.
The Bolsheviks were quite frankly not bothered what other imperial nations or monarchs thought any more than the french revolutionary tribunal was concerned about Austria's reaction when they sent Marie Antoinette to the guillotine.