Not sure why you're getting so downvoted. You might be stating it a bit dramatically, but I've personally seen this attitude in people when living (by choice) in an RV. Many people seem to abhor the idea that someone doesn't live like them. There's broad discrimination against people living in RV parks and trailers in most municipalities.

Many cities ban you putting an RV on your own plot of land, regardless of the purpose. They often ban trailer parks, severely restrict them, etc to the detriment of many economically vulnerable people. There's often a component of racism too as some trailer parks home lots of immigrants or hispanic folks, marking them doubly undesirables.