The answer is the old chestnut,

“When you are accustomed to privilege, equality feels like oppression.”

People like those you’re responding to often see the world as a zero-sum game. If LGBTQ+ people carve out – or in this case, demand – representation for themselves, they believe that representation must take away “representation points” or whatever from some other group.

Frankly, Pride is the one time of year it’s okay to tell these people to shut the fuck up and sit down.