If only. I know a lot of people look at it like this, but it ignores what islam actually is. People think it is analogous to being a Catholic or Methodist. It isn't, not by a long shot. Ben Carson actually had it right when he said he wouldn't vote for a muslim for president. A muslim's first and only obligation is to islam. Islam teaches that the goal is total domination, ie, imposition of sharia law. By numbers if possible, otherwise by force.
It is true there have been Christians who committed mass killings. No church leader called for such acts, and there is not one word in the New Testament that encourages such atrocities and plenty that forbid them. By contrast, the koran is full of exhortations to kill non-believers and others who violate any of the manifold prohibitions of sharia law. Islamic clerics regularly call for jihad, extermination of Jews, attacks on anyone disrespecting islam, etc etc. One of the main duties of a muslim is to memorize the koran, which has numerous passages devoted to killing non-believers, as do the teachings that follow from mohammed's actions, such as the time he personally slaughtered an entire captive jewish tribe by cutting off their heads in the town square.
I do agree that a large percentage of muslims will not personally commit terrorism and just want a better life. Let them find it elsewhere.