Reaction to stupid behaviors

Q: I am a secondary school student. There are some reckless youth in the school with whom I sometimes quarrel. They may insult or hit me on account of looking down on me. What grieves me is that it comes from a Fasiq (someone flagrantly violating Islamic law) who does so not because I am religiously committed, but as a way of ridiculing me in front of a group of youth, though I am able, thanks to Allah, to deter and avenge them. I am fully aware that if these insults and abuses are on account of my religious commitment or aimed at preventing me from performing certain religious duties, I should not lose patience. Nevertheless, what grieves me also, shaykh, is that if I keep patient with the abuse of such youth, they will take advantage of that. I am quite sure that if I am tough on them, the matter will be over and they will even deal with me respectfully. All this happens despite the fact that Islam stresses the protection of a Muslim's personality and prestige among people. It is worth mentioning that those people are Fasiqs who declare their Fisq (flagrant violation of Islamic law) and disobedience in public and do not respect Islam. (Part No. 26; Page No. 319) 1. How should I behave with those youth in the light of Shari`ah?2. When my schoolmate says a word of Fisq and sings persistently in front of me.3. When someone at school insults the religion of Allah (Glorified and Exalted be He) in front of me.4. When a teacher in my school blasphemes Allah's Religion.What should I do with all of them?Should one observe patience when facing harm even with respect to mundane issues? What perplexes me is that if I stay patient with these insults, I would lose my dignity, bearing in mind that I am a Da`y (caller to Islam) in the school, so Da`wah (calling to Islam) would be put off. Kindly give me your Fatwa, may Allah reward you with the best!