The leather pride flag represents an expression of self which is inherently queer, and a community which has been around for generations. It is not offensive to the LGBT+ community in any way. I have seen cis gay and bisexual men standing shoulder-to-shoulder with trans men, all of them united by their leather community roots. The leather community is more diverse and nuanced than you perhaps know, but that is no reason for you to shit on a community you don’t understand.
Here is a photograph from 1998, displaying the leather pride flag, the bear gay pride flag, and the rainbow flag. This is our history.
Here is a photograph from 1987: three queer women entering into the Ms. National Leather Association Contest, or simply gathering as spectators.
A flyer from 1989, rallying the leather community to march in a Stonewall anniversary protest.
A photograph from 1988: Tony Deblase, the creator of the leather pride flag, and a gay man, embracing a fellow member of the leather community. Over his shoulder is Judy Tallwing McCarthy, a Native American woman who was part of the leather community from 1959. She co-founded the first lesbian BDSM group in Portland, along with her partner, Sashie Hyatt.
Just because you don’t know the history, doesn’t mean it isn’t there. Be humble, and always assume you have more to learn. Hatred, and outright dismissal of communities you know nothing about, is the most aggressively anti-LGBT thing I can imagine.
The leather community has always included trans people, lesbians, gay men, and bisexuals. The leather community is global and nuanced. The leather community is where many of us encounter our found families, and our lovers. For you to dismiss that is cold-hearted and ignorant. Just because queer sex is involved, doesn’t make the community dirty or bad.