I would disagree - Islam is schismatic by design. It was founded on disagreement with who the true heirs of the caliphate are, and continued to divide from there. That's why they're such effective terrorists, they're already used to dividing into cells who only know as much as they need to in order to justify their purpose. I do not believe any one Muslim can hold enough power to become a proper Hitler, because there will always be ten other Muslims with -almost- as much power as that one, and they believe their specific Islam is the correct Islam.
Now, the best way to make a new Hitler is with something not nearly as capricious as religious thought and belief, something more dogmatic than religion. Socialism/Communism? Why, there's never been a deeper well to draw from. You could say Xi Jinping is already doing the job, given the genocide and the continued CCP agenda of ensuring all of their citizens believe they are ethnically "Han" despite that being an ethnicity from over 2000 years ago, and the Chinese across the entire country having been raped and pillaged by steppe peoples to the point that they're the muddiest gene pool in the world. Much like "Aryans", the Han have no basis of existence in the 21st century. China is great at making Hitlers.