Yeah, there's normal political corruption and graft, and then there are some who go above and beyond, taking unnecessarily destructive actions that don't even appear to benefit them in any visible way. Usually you can say, "So-and-so did X because Y," even if you disagree with X or think Y is a bad reason. You can at least see the motive.
When the action is clearly going to hurt their political career, and there's no indication that it will put money in their pockets, and they don't even make much of an attempt to claim they're fighting for a principle, yet they clearly have a purpose in mind and keep doubling-down on it, you have to start looking for a motive somewhere else. "They hate their own people" comes to mind, but that's not really an answer because it still leaves you looking for the reason why they hate their own people. Not all leaders do, after all.
When the action is clearly going to hurt their political career, and there's no indication that it will put money in their pockets, and they don't even make much of an attempt to claim they're fighting for a principle, yet they clearly have a purpose in mind and keep doubling-down on it, you have to start looking for a motive somewhere else. "They hate their own people" comes to mind, but that's not really an answer because it still leaves you looking for the reason why they hate their own people. Not all leaders do, after all.