Religion is the root of all evil. Every religion, no exceptions.
D_eddie is a real fuckup for giving you any merit for this nonsense statement. Out of Christianity, Islam, and Judaism, both Islam and Judaism are TRIBAL in nature and view outsiders as the enemy that you should treat vastly different, lie to, steal from, or even kill. You can't even view Judaism and Islam as religions at all because it's simply Nazism for kikes and arabs, and nobody considers Nazism for white people a religion.
Christianity is the only all-inclusive religion out of all three of those, so the only thing that even qualifies as a religion out of that set in the first place. You can even not bother to read any of Christianity and simply summarize it as the golden rule - do unto others as you would wish others do unto you.
Islamic countries are kept weak because the religion sets Muslim against Muslim over minor transgressions of the complex rules within Islam, and forbids critical thought so the contradictions in the Koran will not be questioned, this enables the religion to survive. This is achieved through death to apostates, un-believers who criticize the religion, and Muslims who ask questions. This avoidance of critical thought also discourages science and innovation which undermine Islam, and has led to poor development in Islamic countries.