progressing too far

The follow is a post from The Salvo Blog, Progressing Preferences:

One could think that this Salvo fake ad goes too far simply for the sake of causing trouble and making liberals mad. While that is an enjoyable side effect, it certainly isn't the main goal. The reality is that I could provide links to scholarly articles advocating (at least intellectually) each of the above "lifestyle choices." See the excerpt below for an example of what I mean. That's the problem, isn't it? When does the "progressive" cease to, uh, progress? By definition, there is no stopping. Lars Walker writes about this in a recent post of his:

The Dance of the Straw Men

If you're a social conservative, chances are you’ve had a conversation something like this:

Conservative: “But if we accept homosexual behavior as normal, how do we retain other traditional taboos, like the one against incest?”
Liberal: “That’s just a straw man. Nobody’s going to advocate incest.”

Now, read this, from Tauriq Moosa, tutor in ethics, bioethics and critical thinking at the University of Cape Town, South Africa (courtesy of my friend Dale Nelson):

Thirdly, and oddly, people exclaim [incest is] “just” repugnant. We will examine this more closer later. Nonetheless, why should the sexual activities of two consenting adults concern us? This is the same question we can ask those who are ‘against’ homosexuality (which is like being against having blue eyes). It is none of our business what two consenting adults wish to do (as long as no one else is harmed/involved without consent).

Repugnance helped many things we now consider wrong to continue in the past, such racial and sexual inequality. We can’t rely on repugnance to justify our social policies, since our repugnance is simply that: our own. Besides which, people are repulsed by different things – and we cannot leave it up to the whims of our emotions to implement policies and laws which could, unnecessarily, cause suffering to other people, as is the case with gay people, women, and indeed the current brother-and-sister couple.

Pretty lively for a straw man, isn’t it?

Liberals—I want to share a serious word with you, in honesty and without malice. If you have any principles—any at all—I promise you that, if you continue on the Left, you will eventually either have to give them up or move to the Right. Because liberalism is not a position. It is a process. That process evolves continually. Nothing is out of bounds for it, given enough time. That’s why so many ‘60s radicals are Reagan Republicans now.

For years, people have been telling me (to take another example) that there’s nothing wrong with homosexual behavior because homosexuals are born that way (I’m still not convinced of that, but it’s beside the point for this discussion). The argument is, “If it’s inborn, it’s natural and right.” Christian liberals say it must be God’s will.

“Why would anyone choose to be gay?” the liberal says. “It’s penalized in our culture. So it must be inborn, and the gays have no choice in the matter.”

Bear that argument in mind when you read this, from Italy’s La Stampa.

A study conducted by neuroscientists at Turin University and researchers at the department of neurological science of the University of Milan asserts that pedophilia is caused by a defective growth factor called pleiotropic protein Progranulin (PGRN). The results were published in the journal Biological Psychiatry and presented during a recent convention of the Neurological Italian Society in Turin.

Now, if this theory is true, explain to me how the previously stated arguments for homosexuality don’t apply just as well to pedophilia.

And no, “You’re a Nazi,” does not count as a valid counter-argument.