“The main reason they did it was because Germany was the enemy of England, and they hated England.”
The main reason Catholics in general in Europe saw no point in the war was that in Spain from 1936 to 1939, over 7,000 priests (including thirteen bishops) were killed by forces supported by Stalin and the Popular Front government of France. The war ended (and the Catholic Church survived) in Spain because Adolf Hitler and Benito Mussolini sent aid to General Franco. While the non-Catholic US and UK were comfortable aiding Stalin, I can understand why a Catholic with an informed conscience would just sit it out (as the Axis weren’t saints either).
Americans should bear in mind that while American Marines were dying in the Pacific, while Japan held US islands and part of Alaska, while Americans at home faced rationing so we could export food to the Soviet Union, Stalin and the Japanese had a truce that lasted until the final weeks of the war.
These are facts that dispel many myths about the war and anger some people, but they are facts nonetheless.
Several German Lutherans, including the now famous Niemoller, supported Hitler at first precisely because they thought he would stand up to the Godless Communists. Of course, he turned out to be a Godless socialist in his own right, and the confessing Lutherans courageous enough to listen to Bonhoeffer soon saw the error of their ways during the Kirchenkampf.
Still, doesn’t explain Ireland not giving Jews asylum. Admittedly, FDR refused asylum to them as well, but that was simply because FDR was an evil tyrannical power-mad SOB. Not sure what the Irish excuse was.