Some cultures are better than others ? True, False, Impossible to answer conclusively

[Master]

—In America white supremacists who are self-described Christian are the single largest terror threat to American security, that's according to the FBI and 392 police agencies in a study published last year
—George Bush, a devout Christian, said God told him to invade Iraq, where by some estimates 1 million civilians were killed due to this unjust war

The key words you used were "self-described". White supremacists can call themselves whatever the hell they want. They do not represent the values or principles of real Christians. This should be a totally obvious fact, but for some reason I had to say it anyway. If George Bush really said that, then it just strengthens my opinion of him as a first-class moron. George Bush could barely speak intelligibly in public... and his assertion that God told him ANYTHING is about as reliable as "your check is in the mail."

It's ok to make an argument. But grasping at straws is often seen as evidence of a failing argument.

Bush did often call the war on Iraq a crusade.