There are gay men who are against abortion. For one thing, they're never going to want one, and they're never going to feel a need to pressure anyone into one.
Another point is exactly the one you raise above: if/when genes correlating to increased chance of homosexuality are found, women might choose to abort their maybe-gay unborn children.
Another reason some gays are against abortion is because it's sick to kill human beings like that. Of course, most FReepers wouldn't associate gays with any sort of conservative values, but that's only because they're so interested in labeling gays as "bad guys" opposed to everything good and decent.
Wow, that's quite a statement to make about 'most Freepers'.
I don't know anyone who does that as indiscriminately as you suggest. You are trivializing the concerns of a good many people who are dismayed by the progress of feminism, easy-access divorce, flippant attitudes toward marriage and sexuality, and the "gay-rights" campaign.
Arthur Bremer was a "good liberal" who only did one bad thing -- he went on a hunting expedition in which he stalked Richard Nixon and George C. Wallace and shot the latter. So guess where he is today?
Charles Whitman was an exemplar -- an ex-Marine, devoted to his family -- who went off his rocker with an undiagnosed brain tumor and shot 16 people dead from the top of the clock tower on the University of Texas campus. The police killed him. He's still dead. What are the equities in his case? Were the police too quick to "label" him?