Off the top of my head.
Most of us live in secular societies, so religious heresy is largely irrelevant.
In a perfect world, heresy would be a bad thing because it would promote a move away from perfection.
But we live in a most imperfect world and heresy and heretics can be a good or a bad thing depending on the direction the heretic wants to take us.
To oppose the status quo and to be able to shift towards a better world is a major vehicle for progress.
On the other hand, if people like Donald Trump get in powerful positions where they can make things happen..... Need I say more?
