The UK does have a worse history of antisemitism. In the US, Jews are generally very popular. See https://comrademorlock.medium.com/americans-like-jews-more-than-any-other-religious-group-including-christians-so-why-have-cf899e89a034

I suspect much of the UK reporting has to do with the weaponizing of antisemitism by British neoliberals to discredit Corbyn, but I could be wrong. I should learn more about the Community Security Trust. I do know that the US's equivalent organizations are often criticized for conflating antisemitism and antizionism.