Tesla should have realized their car was going to be the butt of some joke: it's what the show does. If Tesla can't handle being made fun of, then they shouldn't have given Top Gear a car to test.
edit: I also enjoy the fact that top gear is much more opinionated and un-PC than anything else out there. It's keeps it interesting. Yeah, so Clarkson hates EVs, hates Ford, and hates "caravans". Once you can get past this and accept you and him very well may have different viewpoints, he's hilarious.
It's a love/hate relationship. He bought a GT40 (and then had many problems with it, but loved it, from what I remember). From what I can gather from the series, Ford is fairly popular in the UK (with the Mondeo?), so it's an easy target.
Did you hear the one about the electric car? It ended up getting half it's promised range. HAHA!