I'm really not sure what to say about this. On the one hand, while Prox may have had an unpopular opinion, and while he may have been snarky while representing it, it is well within his right.
Just like it is well within our right to put him down for it, or to debate him on it. And, just like it is well within your right to make this thread, and have people put you down about it (since it's not that much better in terms of "maturity").