It is not using homosexuality as an insult. It’s using hypocrisy as an insult.

The hypocrisy is based on allegedly being homosexual, which is unproven and based on "well homophobes must be gay" which is homophobic.

No one said that.

That's the behavior of calling every homophobe gay, they don't need to say it.

yet many of those Republican homophobes are actually homosexual

You say that based on what?

as evidenced by various high-profile instances

Yes, a few high profile instances. I don't think they happen in nearly enough numbers to outweigh the straight homophobes who have the vast numerical advantage.

as well as the multiple times that Grindr has crashed in the immediate vicinity of a Republican convention.

Do you have an actual source for that? Because as far as I can tell it's a meme based on a website which takes user reports as evidence of an outage, which would be very susceptible to false reports because it's funny.

Again – homosexual is fine, hypocrite is not

Sure, but how about you actually wait until one of them is shown to be a hypocrite instead of pinning all the homophobes on homosexuals just so you can have a laugh?

Think about it, Dallas is a huge liberal zone in Texas with a population of 1.33 million, Grindr and underlying network infrastructure can definitely take big loads. Even if every single person there for the convention was a raging hypocrite, do you really think that is enough to cause a complete outage? It's silly. The articles I see say they expected 20,000 people, and maybe another couple thousand were waiting in a line or something. Even if we assume each and every one is instantly hopping on the grind (which is a HUGE if), it would still be a drop in the bucket compared to the usual traffic of Grindr in Dallas.

Attack Republicans for what they are (or are shamefully revealed to be), not what would be funny if true. That just gives actual straight homophobes an excuse ("I'm not homophobic because I'm definitely not gay") and spreads the narrative that homophobia is just something gay people do to themselves.

It's not hypocrisy unless they're actually gay, and statistically it's unlikely to be the case for the majority of attendants.

say it as much as you want, doesn't make it true