Race can mean biological factors, and it can mean sociological factors, according to the definition I provided. Religion falls under the umbrella of sociological factors, so it is covered in the definition I provided.

The Tamil Tigers are made up of people of several religions as well as people who are secular and atheistic. The Tamil Tigers have been using suicide bombing as a strategy for decades...

http://www.globalsecurity.org/military/world/para/ltte.htm

And as I said before, there have been Christians who have committed suicide bombings in the Middle East.