Criticising Islam is not racism, but discriminating against Muslims because they are Muslims is bigotry. I think it's healthy to criticise religion, or any all-encompassing dogma that has a negative and possible destructive hold over people's lives (e.g. free-market fundamentalist neoliberal capitalism) and to engage in argument and debate with those who follow them, but it's not right to generalise, be prejudiced or oppress them.

Who you calling American? I'm as British as fish and chips and mushy peas ;)

If you are British, you don't call it soccer.