Sounds to me as if these new members are resisting the word and it is making them uncomfortable, so they lash out.
They come to worship (or whatever they really do...not sure how to word that) and are conflicted with their egos. If they are not top dog, then they are not successful. What they do not realize is that the WAY to true success is not the path not taken so to speak, but the line that everyone else is in.
I recommend that they are kept in your prayers. Sometimes people are their own crown of thorns.
I am sorry this is causing grief for the congregation, but this is really their problem, one they are bringing in with them, and not one with the church. That is my two cents. I will say a prayer for you.