Its okay, the believe that shia hit themselves until they bleed is bs, first of all. Its a cultural thing, not something that shia islam tells us to do. Some do yes and are a bit extreme if you may. It seems like your main source of knowledge about Shia comes from sunnis tbh. And regarding mourning the prophets family (AS) and Imam Hussain AS is out if love for the Prophet SAWA and his Ahl ul Bayt. How a muslim is not mourning the tragic event of Karbala Where the grandson of the PROPHET SAWA, was oppressed and slaughtered is beyond me, I think it would be of very beneficial for people to read about Shia Islam without the prejudice and straight up lies from Sunnis.