Thanks for the thought-provoking and interesting post, johnwmcn.
I think the gist of Beck's segment was for congregants to be cautious about the term 'Social Justice'; to try to discern if it's merely code for the church or pastor advocating more government control over our lives and businesses. Beck was saying that the very term 'Social Justice' is a big red flag that very well might mean the advocate of SJ is preaching leftist/collectivist political theory rather than theological or religious ideas for the individual. A big red flag with a hidden hammer and sickle. Even the tyrannies of the Soviet Union and Nazi Germany allowed politically approved nominally Christian churches to operate, to preach the "virtues" of the policies of their respective slave-States, while appearing to be tolerant of those who wouldn't kneel and pray directly to the dictator.
Social justice, in the context that the individual or a particular congregation should seek to help those less fortunate is a laudable and honorable practice.
"Social Justice", in the context of advocating the political theories of Marxism and/or collectivism underneath the veneer of a Christian sermon, is the thing to which Beck was advising discernment and caution. Beck was saying that "Social Justice", if a call to growing our governments' powers and debts, is really socialist injustice.
A wide mis-perception about Christianity is that it's a monolith of Bible-thumping, hateful, intolerant, racist right-wingers.
For good or ill, Christianity can be interpreted in any way that conforms to one's political beliefs; consequently, there are probably as many left-leaning sects and denominations, if not more, than those that lean conservative.