Avira, looks like my position is slightly different from the Rav you are quoting. I simply think we should not get involved into controversial topics where our stakes are low and controversy is high. For example, fighting Nazis was somewhat controversial in US but was important for us and also very clear morally. Advocating for Soviet Jews was important for us, clear morally, and while opposed by some commies, did not really intrude on most Americans. Supporting civil rights in the 60s was reasonable morally, but ventured into controversy and while satisfying some, lead to mixed results (as I heard from people who participated). In this case, this is a very peripheral issue for our community (possibly affecting an Alabama Chabad House), very controversial, and with somewhat mixed morality. So, I would simply stay away. I do admit that other positions are possible (except rabid defense of abortion for the sake of liberal dogma which is disgusting).
