No, they are not racial groups but religious groups.
Catholics Muslims Jews
No, it is between Protestants and Catholics.
Yes, I believe so.
Protestants, Catholics, Jews
The Nazis were interested in exterminating groups that they felt were inferior. Jews, disabled people, Slavic people, and gypsies were the groups that were exterminated on racial grounds.
The same God worshipped by Jews, Muslims, and all other areas of Christianity
Of course not. Catholics consider Muslims unbelievers. All religious believers will consider themselves as true believers. However, Muslims don't consider Catholics, or Christians in general, unbelievers. Muslims consider Christians (as Jews) people of the book because Musilms believe in the holy books of the Bible and the Torah.
Most religions have holy sites, including the Christians, Jews, Muslims and Catholics.
European- roman catholics and Jews
Muslims Spain during the Middle Ages was a golden age for both Muslims and Jewish thinkers, poet, artists, and scientists.
* Jews* Muslims * Vegetarians, who don't eat any type of meat; this includes the followers of some religions as well
Muslims, Christians (who were all Catholics at this point) and Jews, in order of population numbers.