Is it weird to sometimes wonder whether everything you know is wrong?

I don't know, sometimes the though of "what if all my leftist ideas are false? What if trans people are just mentally ill? What if gay people are just deviants?"I honestly really don't like it...

It's good to question your beliefs I guess, it's how you grow, but it sometimes makes me really uncomfortable. Why does this happen? Can I stop it? Should I?