What about rational emotive behavior therapy is false?

REBT is a type of therapy that pertains to the here and now. It doesn't focus on fixing what happened in the past.

Classical therapy was about delving into the past to fix the present. They might say your mother didn't love you and that is why you are struggling with relationships today. Trying to come to terms with it that way can take many years and not really get anywhere.

Using the relationship example, an REBT practitioner might conclude that you have trouble loving yourself and that you don't handle criticism well. So the therapist would work with you to change your inner scripts to where you don't make yourself feel miserable when another person doesn't love you as you desire. They'd get you to realize that you're just human, that you're not perfect, and realize that if others reject you, it is about them, not you.