I think that California has progressed in the EV adoption curve such that it's not a "virtue signaling" measure nor a marker of someone that leans left.
They're just cars with an alternative powertrain, not a political statement. While this might be a left-leaning state, this is also Orange County, a red[dish] outlier county. And yet you can't swing a dead cat without hitting a Tesla 'round here.
That said, I do see a TON of Tesla cars with various anti-Elon stickers or other stuff on them. So buying the car but trying to separate yourself from the stigma is definitely a thing.