I could almost see the latter case - from a strictly hypothetical point of few. A person could declare himself a 'social conservative' - i.e., against unrestrictive abortion; against homosexual marriages; against pornography; etc; but then at the same time declare himself a fiscal 'liberal'. That is, high taxes, and womb to tomb support by the government... The problem with this example is that it is strictly hypothetical. Government is a godless blob, and once one surrenders their rights to this monster, they become enslaved to it and being a 'social conservative' means nothing because the government is going to rule your life as it sees fit.
But as I consider further Mr. Obama's claim that he is a 'committed Christian' vs. the evidence:
1) A 20 year member of an 'establishment' that preached racial hatred and division. A den of iniquity and poison which he felt fit to bring his young daughters.
2) Unbridled zeal and support for abortion (and even crossing over the line into blatant infanticide in the case where he bottled up a bill that was intended to protect babies that survived a botched partial birth abortion).
3) Support of homosexuality -- thus encouraging lost souls to continue on a path of depravity...
I'm left with the conclusion that the word "committed" must equal "anti" in Mr. Obama's lexicon...
IMO it’s real simple and the comparison is apt.
A “committed Christian” is a leftie social activist, as opposed to the mere “Christian” who goes to church every Sunday.
A “social Conservative” is also a churchgoing activist, with the signature cause of anti-abortionism.