Why are Islamophobes so ignorant?

They claim that virtually all acts of terrorism are done by Muslims, and give no evidence to back their argument. Many Islamophobes also defend Christianity, which has a bloody history and is responsible for the deaths of millions of people and conquered more land than Islam has. Why is it that Islamophobes ignore countless acts of terrorism done by non-Muslim groups, which far like FARC, IRA, the Lord's Resistance Army, the Ku Klux Klan, the ETA, Neo-Nazi groups, far-left groups, and so on? It's all hypocrisy.