If you understood how it's disrespectful, it wouldn't be hard to explain. Here's an example:

Sexual assault is disrespectful because it violates a person's bodily autonomy, which is a fundamental human right.

See? Easy. Now, try that for "people who dress wrong".

The community is selectively bred Redditors, fam. We're just lucky they ban the obvious racism here.

Just pop your head into the threads about how showers are a scam or whatever and keep it in mind whenever you're talking to them