Why was there a Kindertransport?
Because we wouldn't let their parents come with them.
Five years into the Nazi persecution, we wouldn't let their parents come with them. And we insisted every child had someone to meet their "costs". And we only agreed on condition most would "re-emigrate".
Unfortunately, and as I write about in my current book... British society in the 1930s... and even after the start of the war... influenced by newspapers like the Daily Mail was just as hostile to Jewish German and other refugees of Naziism as their modern descendants are to 'asylum seekers' today.