That it should be A concern is not in question. The question is whether it's a good idea to have a Presidential campaign revolve around it as THE MAIN CONCERN. Because you know the MSM will make this issue be front and center for a Santorum candidacy if he wins the nomination.
The debt, the economy, Obamacare, have all been talked about at great length and in great detail by Santorum, and will continue to be addressed 'front and center.'
The fact that the Obama administration is lawless is a major problem, and Santorum's bringing up that the laws against pornography (among many others) have been ignored, is a major concern......or at least should be......for all Americans.
Don't be afraid of the moral issues in a campaign. They are winners because the majority of Americans don't have a problem with addressing them.