It doesn't need to 'help him', he is sufficiently motivated to do stuff for the simple reason that it hurts people he sees as enemies. He has a record as long

It doesn't need to 'help him', he is sufficiently motivated to do stuff for the simple reason that it hurts people he sees as enemies. He has a record as long as his public life of being capricious, vindictive, and petty. This is ancient, settled history by this point, as clear as the sun rising in the East.