It is true that most attacks in the recent past that have been religiously motivated have come from Islam. However, throughout history, religions have cycled in and out in terms of who are the terrorists when. Do the crusades ring a bell to you? 'Holy' wars have been a staple for centuries. Yes, this was years ago, but someday this will all be years ago too. Quite honestly, though it's perhaps a bold move to state this in public, it is my broad feeling that throughout history religion has done more harm than good.
It is also worth noting that, though many people from all three religions will deny this, in extremely broad terms Christianity, Islam, and Judaism are quite similar, having many critical and cornerstone points 'in common'.