Why dont Trump supporters wear masks?

Because they view it as a badge of shame.  It's an admission that their political rivals were right about how serious the pandemic is.  

They believe virus is a hoax. 

I do. So are you satisfied with that? Dr. Fauci? Is that you?

Because Trump politicized it.  US politics demands that just about every issue be declared to be on one side or the other of the political divide and then the sheep have to follow suit in order to maintain their identity.  It's really quite foolish because viruses don't really care about human politics.

The people who refuse to wear masks because Covid has a "98% survival rate" are the same ones who fear the vaccine because it has a 0.000006% chance of blood clots.

Make it make sense. 

Because they believe that they are so right that not even a virus could possibly disagree with them.

Because all Trump supporters are selfish, disgusting warthogs like Trump himself