Voting against your own self interests

I saw a recent report that el donaldos latest order which removes subsidies for the healthcare market will disproportionately impact people in 20 or so states that he won, and where people really supported him. And to be fair, these are states where people have been historically under insured - and who were helped by Obamacare.

Before Obamacare, there was money given to the state through various programs to fund public hospitals and support the states general health issues. So people could (and did) turn to the public care system when they got sick and didn't have insurance. But all that money was consolidated into the subsidy program, and its not being returned to the public health system.

So in effect, their support of this guy actually worked against their own best interests. And their own health and well being.

It makes no sense, and perhaps at some point, they will realize that they were conned.

So I have to ask "why are you hitting yourself?"