ALL religions are based upon individual faith and beliefs, not facts, gleaned from some holy book or other.  Each religion believes its book is the "word of God."  If someone subscribes to a religion, he must realize this, and accept that there are those who do not share the same beliefs.  The ironic thing is that God would be perfectly satisfied if everyone were to live an ethical life, be happy, and be the best person he can be.  You don't need a religion in order to do these things.  In fact, you don't even need to believe in God at all.

Most Arabic hate groups profess to be Muslim, Most American hate groups profess to be "Christian."  There are Jewish hate groups, as well.  Every country and religion has them.  It goes along with thinking that each has its own god.