Riley Dennis is a trans activist. Kind of an angry one. Demanding. He's apparently a male to female trans, but still goes by his male name and pronouns, and doesn't really look or sound all that female to me. I really don't know his videos (only seen one, and that was because it was being commented on (ridiculed) by another YouTuber) or all the apparent YouTube drama surrounding him and his points of views. The only thing I know for certain about his is that he has an Adam's Apple that puts Ann Coulter's to shame. But I ran across this, and it's hilarious. He created a T-shirt that says "There are more than two genders," but you can only select one of two genders when buying it at check-out.
It comes from this Tweet.
It comes from this Tweet.