"if god allows the devil to do evil, he's a accomplice and, if he doesn't, he's not omnipotent"

That's a phrase that I heard recently, and I think that it's from some famous philosopher, but uhm...

I don't know how to debunk it.

I'm doing my best to believe without thinking too much about that.

Some days it gets hard tho, so I'd like to hear you guys' take on it.