"If I could be bothered, and I can't to be honest - I could find loads of bloodthirsty quotes in the Bible exhorting followers to murder non-believers..."
Andy ("Am i bovvered?") Hughes, I'll save you the effort of research.
The most violent passages in the Bible are in the OT, most especially in Joshua , Judges and Samuel 1+2 when the Israelites were invading Canaan and consolidating their power there. These texts are incitements to divinely warranted genocide. On the other hand I am unaware of ANY texts of the New Testament "exhorting followers to murder non-believers,". Somebody with more intellectual curiosity than you may care to contradict me. Not, you understand, that Christianity is soft on unbelief; rather that NT eschatology teaches us that the task of killing sinners will be done not by his followers, but by "the Son Man returning in clouds of glory".
That is why you don't get Jehovah's Witness jihadis.
Now let's take these two remarks:
"... no difference with the Quran".
"Of course, you can find psychopaths in any faith who will use their holy book on which to hang their perverted beliefs, but to try and include an entire religion in the beliefs and actions of a deluded few is surely not rational. "
OK, try this on for size. We'll take your putative psychopath and hang a Christian label on him. Now, then would our fanatic be able to cite any case from HIS religious texts where Christ and his early followers beheaded, or crucified non-Christians, or enslaved and raped non-Christian women?
The answer, by the way, is NO. You don't disagree with my conclusion, do you, Andy?
Now replace Christ and Christian with Mohammed and Muslim and ask the same question. Both Koran and the Hadith abound with examples which could be seen, PERHAPS falsely, but certainly VERY PLAUSIBLY as justifying just such acts.
A few other things in his core NT texts which would make things difficult for the most determined Christian psychopath:
"Love thine enemy".
"Forgive those who persecute you".
"Turn the other cheek".