Idk, a 1996 study of 60 men doesn’t sound definitive. That’s their best evidence?
Edit: the study is, as I expected, not great. The homophobic men were far more aroused by the lesbian and straight content. The article is also misleading in saying all of the homophobic men were aroused by gay porn. It was actually around half. So we’re talking roughly 18 men. However, erections can happen for a number of reasons. Fear, for example, can cause erections. These homophobic men had just taken a survey about homophobia. Knowing what the study was about, wouldn’t they be afraid of being labeled as gay? I don’t buy the results.