Emo or Not

It confuses me when people call 3rd wave emo bands "not emo"

like do you not realize that a genre changes over time? like compare midwest/2nd wave to rites of spring. 

like yes bands like Alesana, Jimmy eat world, Silverstein, *EARLY* fall out boy, A vain attempt, Senses Fail, An evening at elmwood, etc etc are EMO

3rd wave emo IS emo. point blank dot peirod