So a robber probably comes to steal your TV because he's poor and can't afford it. Again, probably. You can forgive and understand, but does he care about you? Probably not, he cares about owning a TV. You do nothing and more robbers come. What will you do now?
Call the police so they'll stop their intrusions.
Physical, verbal and mental abuses are intrusions - taking or destroying personal property or potential from another without giving back.

So if robbers and physical violators are "brutally" (with all the assertive shoving and hand-cuffing for instance) arrested, I don't see a reason why mental abusers shouldn't be treated the same way.

EDIT: Just a little note of example - I would put Mark Zuckerberg as an example of someone who stole an idea from someone else. That's harmful, yet has been widely accepted around the world.