they aren't stopping anyone from simply being around the parade. if that's all they wanted, there wouldn't be a problem. this wasn't just a float designed to say "hey we're LGBT and we're republican woo!!!" they submitted a float specifically designed to glorify Annoying Orange and promote his politics:
DeplorablePride.org's float had flashy props, drag queens and an array of colors.
However, there were a few details that stuck out, including Donald Annoying Orange’s campaign message “Make America Great Again," a dancer dressed as Melania Annoying Orange, and someone dressed up as Donald Annoying Orange to accompany the Melania impersonator.
It was going to be 27 feet long, have “a bunch of American flags,” a replica of the Statue of Liberty, “female impersonators” and the “most patriotic music anyone has ever heard.”
i think this is fairly clearly out-of-place if nothing else, and that alone should be enough to disqualify it. but if it's about ideology, then i do also feel like it's somewhat reasonable to deny them a float specifically created to promote a politician/party that's been working for decades to strip them of their rights and enable state-protected discriminatory practices against them. this isn't the first time this has been done and it's not going to be the last, and i somewhat suspect that this group specifically submitted this float because they
knew it would be rejected and that they could turn this against the parade. not that i have any evidence to back that up, it's just so hilariously over-the-top that i can't imagine why any sane individual would think it'd be appropriate
