Tough! I shall make any comparison I wish. In 1939, it was not known that the children would face certain death. Gassing of Jews hadn't started.
The children who have been allowed into the UK have relatives here, which is why they didn't want to stay in France. Not only that, but there's a history of French persecution of Syrians from the time when France had a mandate. Syrians tend to be suspicious of France.
A few years ago, I attended a talk about the Kindertransport. About half of the attendees were children of Kindertransport children and there were even a couple of the children themselves. At the time (1939), there was a certain amount of suspicion, because some of the children were the offspring of Communists, who were also being persecuted by the Nazis. There were some factions in the UK who were even more suspicious of Communists than they were of Nazis. If you have the time and the will, you can dig up old newspaper articles about the suspicion.
There was a collection at the end of the talk to collect money for Syrian refugees, even though the 'situation' in Syria was only just kicking off and people didn't know the full horror of what was to come. People (mainly Jewish) who had experienced a similar situation themselves were very generous and they certainly saw the similarities.