I think that is just what you’re being led to believe. I meet pretty hardcore conservatives all the time who have Teslas or other EVs. Hell, I can walk to the end of my street and there is a front door covered with a large Trump flag that has 2 EVs, a Model 3 and some Ford, in the garage.
No one has 'led' me to believe this because I've not heard anyone else say it. If you are trying to tell me that US conservatives have not politicized renewable energy in general and EV ownership in particular you are being naïve or dishonest. Musk is a salesman and has exploited this by doing what has worked for US conservatives since Rush Limbaugh- acting stupid and obnoxious.