You are correct that he is vindictive, and that his targets are always the individuals who he feels wronged him.
That is not at issue here. He will not hurt large groups of people out vindictiveness. He will do it for the ratings.
He is a populist, and does whatever he feels will get his “viewers” excited. If that means doing mass deportations and immigrant bans, well… he’ll do it because he hopes it means his show “Celebrity President” will get picked up for another season.