I agree with all you have said except that if we, who follow the Quran, resort to abusive language and calling names, then I am afraid we will be no better than any other so called Muslims. How can we preach The Quran while violating it ourselves?
49:11 O You who have chosen to be graced with belief! No folk shall make mockery of other folk, for they may be better than they are. Nor shall any women ridicule other women, for they may be better than they are. And neither shall you defame nor be sarcastic to one another. And do not call each other by (offensive) nicknames. After attaining Faith, evil indeed is (calling by) names that drift away from decency. Those who do not return to the right way are the wrongdoers. [Taubah = Returning to the right path = Repentance]
Please understand this is not a personal attack on you, but a general observation about the posts on this forum. Let me first criticise myself, for I too have been guilty of similar conduct.