It's referencing the spikes the app sees whenever there's a republican event around.

"On the night of July 17—the Sunday that check-in for the [Republican National] convention began—there was a 120 percent increase in users online in the area, more than all previous evenings in July. As of last Wednesday, a representative from Grindr tells Broadly, “more than a thousand guys have used the app near the Quicken Loans Arena.” The total attendance of the RNC is estimated to have been roughly 20,000 people, so this data suggests about five percent of attendees used Grindr during the convention."
https://www.vice.com/en/article/cleveland-was-bombarded-with-white-dudes-on-grindr-during-the-rnc/

Honestly, if these republican leaders were honest and open about their homosexuality, I’d respect that. But they push strong anti-gay policies, gussied up as “family values,” and then when they’re out in the road away from their families they hit up Grindr. That I can’t respect. Gotta call out that hypocrisy.

I am sorry if that bothers you.

They bring sexuality into it with their policies. This is criticizing their hypocrisy about sexuality.