That's probably true.

But you have to spend at least a little time with someone to judge their behavior.

The problem is that people are pre-judged based on their race, gender identity, sexual orientation, religious beliefs or lack thereof, nation of origin, first language, and a boatload of other things purely based on these factors without any personal contact or observation of their behavior.

Hence the word prejudice.

Likewise, people take the misbehavior of one or a small group and and apply it to everyone with the same characteristic.

Hence prejudice and stereotyping.

And there are many people out there whose behavior can be described as: judging others' character based on superficial qualities such as gender presentation or race.

And my judgement of that behavior is that those people should be shamed and educated.

That's why I generally divide people into two groups: assholes and not assholes.