Sadly, there was a lot of anti-Semitism among the Brits. Remember the problems between the Jews and Brits in Palestine right after WWII leading to the foundation of the state of Israel?
See the 1960 movie “Exodus” if you haven’t yet.
Perhaps. . .but if the guy was quoting anti-Semite remarks by Churchill he would not be arrested, and given the anti-Semitic nature of Europe and the UK, praised.