I am a student in the girls college and there is a huge number of shiah living among us. Currently they are wearing black for the occasion of Aashooraa . Is it permissible for us in response to wear bright colours and extra adornment for the sole purpose of annoying them?! Is it permissible for us to backbite about them and pray against them, knowing that they have clearly expressed hatred for us? And I have seen one of them wearing amulets on which are written mysterious words and she had a stick in her hand with which she was pointing to one of the students, and I was harmed by that and am still being harmed. May Allaah reward you with good.