That graph doesn’t tell us anything, though. 100% of what? People who were the most against homosexuality? In those countries? Likely, but why are they afraid to say so?

They remain common in the USA also. People are dicks.

Is this a graph of “report negative opinions about homosexuality”, or “think homosexuality should be illegal.”

The former is just freedom of speech (“freedom to say something dumb and bigoted”), while the latter is a public policy concern.