Churchill had been begging the U.S. to join the war for several years. Instead FDR offered the lend-lease program at the end of October 1941, and didn't commit to joining the war until we were attacked by Japan, and Hitler declared war on the U.S. Had we not been attacked, and Hitler hadn't declared war on the U.S., this country may have never gone to war in Europe. England declared war on Germany in September 1939, two years before FDR even offered the lend-lease program.
You should worry more about who your country capitulated to in WWII, than who the U.S. sided with.
If America had not started to massively support the UK with military equipment beginning september 1940, Hitler would never had declared war against America.
So why did America start help the UK against Germany’s relentless assaults?
Because America is a civilized nation and knows how to show respect to its fathers and forefathers which were all mostly english. A family is a family. I respect family values.