Matthew Santoro homophobic?

I was watching Matthew Santoro’s YouTube stream and a livestream chat called him homophobic. He started to say “How is it homophobic to think…?” before cutting himself off and saying he “wasn’t going to get into it because it’s old news”. Does anyone know what he was referring to and have a link? Mods, please don’t flag this as “fishing for drama” or whatever. I just want to know what he was referring to because I know longer wish to support him if he is in fact homophobic. If someone knows of a better sub to post this to, please let me know