To be fair, it wasn’t Dave’s idea or something he supported. It was bassist Nate Mendel’s message that they were, admittedly, amplifying. Even the info on their website had a disclaimer that listed it as “being displayed at the request of Nate Mendel”.
I think they all regret being involved in amplifying that message too, including Nate. In the 20 years since they initially broke support with the people involved, they’ve played several shows in support of HIV/AIDS awareness groups, fundraised for Elton John’s AIDS Foundation, and every tour they do now has some kind of fundraising or auctions to support AIDS education or LGBTQIA+ rights.
It feels like they know now, in hindsight of course, that it was harmful and have at least tried to do more good to make up for it. Mendel was even quoted saying that the only reason he did it was because he thought he was helping people, not hurting them.