I am English by Birth but Canadian by choice and British History contains many periods which are nothing to be proud of.
Jews were burned or expelled, Catholics slaughtered Protestants and vice versa,children were used in the mines, the list is endless.
Britain holds no monopoly on this,Americans and Canadians slaughtered Indigenous groups, as did the Australians and the Spanish.
Japan and China,the Mongols, go back far enough there is no one immune,including the Vatican, a corrupt and dark history stains it.
Move on, the past is the past,today is our reality, just do not repeat past errors.