Unsurprisingly, religious people were more likely to be homophobic - in fact, religion was one of the strongest predictors of attitudes to homosexuals.
It also turned out that more religious people were more likely to be authoritarian, conservative, poorer, and Protestant - all factors that also predicted homophobia. Women were also more likely to be religious, but less likely than men to be homophobic.
But even after taking all this into account, religious people were still more likely to be homophobic. In other words, an authoritarian conservative is even more likely to be homophobic if they are also religious. Women are more likely to be homophobic if they are religious. Among all the possible factors they explored, two stuck out as being much more powerful predictors of homophobia than the rest: conservatism and religiosity.
So it seems that religion really does make people homophobic. Now, the interesting thing is that, although religion was also linked to racism, the link was extremely weak. So it doesn't seem that religion
in general is acting to strengthen group identification. The implication of this is that religion really does powerfully add to homophobia because of its moral condemnation.