“There have got to be so many people who are so embarrassed to be repping him on the streets driving their Teslas and who want to completely disavow this guy.”Drag RaceFor longtime Tesla owners, Elon Musk’s increasing rightwing crusading has made their electric cars into mortifying red flags — and now, a bunch are sticker-slapping back.As the climate change news site Heatmap reports, a Hawaii-based sticker maker is doing a booming business selling bumper stickers to Tesla owners who, as one of his wares advertises, got their EVs “before we knew…