A simple explanation of what racism is:
It is racist to blame an entire race for the actions of individual members of that race. It is racist to be afraid of people because of the way they worship god. It is really racist to decide you know what's in a person's heart because of the way they look. It is fantastically, extraordinarily racist to believe that people should not be allowed to hold elected office because they are Muslim.
It is racist to blame members of a race for your own prejudice against that race.
It is worse to be racist than it is to point out racism.
The only defense against racism is awareness of it.
I got preachy there. Things are getting ugly. Stop being racist.