This 'If you're not a vegan bicycle rider don't tell me what to do' logic is absurd.

The point is that people have so little understanding of what is going on with the climate they won't even modify their behaviour slightly, even when getting a sedan with higher efficiency and better safety will cost them much less.

So no, I'm not calling SUV owners rude, it's a rhetorical device to highlight that they are metaphorically thumbing their noses.