Not all of them.
Cis guys are raised in this society where hypermasculinity is the only way to be, some people still find long hair in men to be an stigma so you can bet that if you show support to the queer community then you'll be considered less of a man and most likely gay and since most of these peeps aren't 100% confident about themselves then they'll resort to following the norm as long as they can keep their "manhood".
Obviously, there are cases where those who bark the loudest are gay on the down low or want to be experiment with their sexuality.