they are no different than anyone else doing those things for their own reasons
They are absolutely different, because in some religions, devotion is rewarded or promised heavily in the afterlife, which creates a great incentive. These people are more likely to become radicalized or extremists, often going out of their way to impose their worldview on others through harassment and aggression. Although I could easily point to radical Islamists, I can also point to Mother Theresa, who inflicted so much pain on others when she thought she was doing good. She said suffering is what God intended and so she did.
And let me point out cults. They are overwhelmingly religious, using that imagery to win people over and oppress them all at once because they know a large swathe of people will be unwaveringly loyal and just as exposed when they feel personally connected to a higher being. They take the most effective parts of religion to control people and apply them to exploit and profit. And it works wonders because religion is already in that exploitative format.