Because it's a legitimate story. Obama tries to give away the farm, defense-wise, to Putin one day, and the next day (Literally) his 11 year-old daughter has a peace sign the size of Texas on her t-shirt. Parents control the attire of 11 year old kids. It's pretty obvious what kind of anti-American message was been sent.
JimRob had no problem with the post. Neither should you.
The thing that offends them the most is probably the name, Free-Republic -- they see that very concept as unacceptable and obscene.
Caption articles can help alleviate the stress of seeing articles about Obambi tearing down the nation for purposes of rebuilding it for his oligarchian handlers (or, at least that's a theory...), day in, day out.
Someone described the "spiral of silence" whereby good people are knocked down, knocked down, over and over, until the silence begins...PC is about just that. Keep the "acceptable" language as a moving target, to the point where everyone is afraid to speak up.