I'm not quite sure what you mean by the "bottom line", but the list itself is backed by evidence; it's not an opinion piece, just a summary of facts
Nope, the site presents a conclusion and cherry picks soundbites to suit their agenda.
What the "the bottom line" means in this context is that they started with a conclusion and went out to prove it. That alone makes the site extremely untrustworthy (a proper study starts with a question and seeks to answer it, junk science starts with a conclusion and seeks to support it).
The article the GP linked to can be summed up in this sentence. People who are dead set in a belief will look for evidence to support it no matter how irrational and ridiculous it is.
BTW, the site you linked to contains no facts, it is an opinion piece with poorly presented soundbites to make it look factual but really presents a pre-baked conclusion.
I'd like to see a list like that for other religions, really
-Northern Ireland.
-Anders Breivik,
-The Lords Resistane Army (Uganda, child soldiers, sex slaves and all that stuff you like to whinge that Muslims do).
-The Army of God (USA, bombed abortion clinics and attacked doctors).
These are just the recent non-islamic religious* motivated violence (the conflict between the Catholics and Protestants in Northern Ireland alone is enough to prove you're just ignorant). You've then got all the terrorist groups in South America which is decidedly Christian.
*Not picking on Christians mind you, Like Muslims I know the majority are not terrorists but these are just the most prominent examples in recent times.