The graph is kind of fun but on a pretty simple level. It seems to be saying that the more str8 someone is, that is the less someone even bothers to question their sexuality, so the less they'd care of someone is gay, so therefore the less homophobic they might be. Though that does not account for homophobia instilled by, say, their religious beliefs. It does show more homophobia on the str8 side of the scale, with the most on the str8 side where those who might have inclinations could be questioning and so therefore could be more unsure of themselves which could give rise to homophobia.
I'd like to see a study done showing someone's comfort level with their own sexuality and then, should a pattern show, have that information transferred onto the graph.
Because I'd imagine, but don't have data, that there must also be plenty of people who are completely str8 or absolutely gay and yet not necessarily comfortable with their sexuality for whatever reason other than questioning their sexuality.
Also, I think most homophobia comes from ignorance either of issues or by lack of self awareness and by that the graph seems to say that the more a str8 person has gay leanings, the more ignorant they are, when we've already concluded in other threads that being gay is way smarter.
References (listed on the website)
The Kinsey Scale (The Kinsey Institute)Reaction Formation Definition (Wikipedia)Homophobic Men Most Aroused by Gay Male Porn
Homophobic? Maybe you're Gay (New York Times)Is Homophobia Associated With Homosexual Arousal?
(Journal of Abnormal Psychology)Parental autonomy support and discrepancies between implicit and explicit sexual identities: The Dynamics of self-acceptance and defense (American Psychological Association)Video: Is some homophobia self-phobia? (LabSpaces.Net)