The majority of Muslim countries live in the realities of the Middle Ages and perhaps their religion is a secondary cause and main reasons are poverty, weak education.
Islam is a younger religion than Christianity. And this is a mass religion. Today, it has successfully come up for use by all sorts of extremists and destabilizers. But on a historical scale this is a very short time. Any religion can be warlike. Anything can be peaceful. Everything depends on the degree of dogmatic nature of the followers and the interest of the instigators. In Russia, about 10% of the population are Muslims. And we are well aware that Muslims can be both aggressive (two Chechen wars, plus constant external problems from Saudi Arabia in former years and IGIL today), and peace-loving ones (Tatarstan is a peaceful Muslim republic within the Russian Federation). I have many friends - Muslims. But they are not Islamists. And so you do not even know that they are Muslims. Well, maybe, you will not make them eat pork. But they drink wine and vodka willingly
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Update: Sorry, just now drew attention to the nickname - then we are probably compatriots and I wrote the obvious things to you