> Do you actually think anti-car people are actually that stupid or inconsiderate?

Yes, I do. I hope it is not shocking for you that people are treating you based on how you behave?

"We should make cities walkable and transport efficient and there are more efficient options than individual car travel" - probably someone smart and considerate.

"Cars were mistake from the beginning!!! Ban all death machines!!!!eleventy" - probably someone stupid and/or inconsiderate.