There are also some hideous elements in the histories of every country. For example, alleged witches were sentenced to state sponsored murder in both England and the USA. This should not be seen as defining modern Brits or Americans.

Hmm. Well, my family comes from Pendle in Lancashire. I took my mum for a drive round Pendle last week as it happens. Beautiful country it is, the north of England's best-kept secret. The "witches" from there who were executed a few hundred years ago were hounded by Christians. The church at Newchurch-in-Pendle, the graveyard of which contains burials of many of the witches' families, still has a huge eye sculpted on the tower to ward off evil spirits. The rabid antisemitism that gained currency in the late 19th century in Europe (thanks a lot, Wagner), and which culminated in the Holocaust, was connived in very consistently by the Catholic church. Pius XII (now up for sainthood) knowingly oversaw the removal by the Nazis of a thousand Jews from the Vatican to death camps and facilitated the escape to south America of Nazi war criminals at the end of the war. The Church was silent about Hitler and did dirty deals with Mussolini. There is institutional covering-up of child abuse in the Church that has been going on for decades and which continues to this very day. Your history is more modern than you seem to think, but it doesn't define modern Brits and Americans. It defines, if it defines anyone at all, modern Brit and American Christianity. Unfortunately, it seems that few adherents of such choose to vote with their feet.