One needs to avoid all sorts of behaviors that would set a Muslim against another. That is both unlawful and inauspicious. God doesn’t like such an atrocious manner. No one should ever encourage such an approach.
Our Prophet (saas) says that the sole address for the Islamic Union is Imam Mohammed Mahdi. There is no other address for that. If they believe in the portents of the End Times, if they believe in the miracles of our Prophet (saas) they should know that this is the truth.