this question could be rephrased to:

dear idiots, why are you so stupid?

OR

dear sociopaths, why are you so selfish?

the motivations don’t matter. they can;t be reasoned with.

conclusion: guns.

hypothetically speaking, if someone blew up their office HQ, that would send a powerful message. of course, if you have the balls to do that, there are some other offices that would probably be much better targets.