How should the believers react to any kind oppression or violence against themselves ?

 

Verses 36-43 of Chapter 42

Whatever ye are given (here) is (but) a convenience of this life: but that which is with Allah is better and more lasting: (it is) for those who believe and put their trust in their Lord: Those who avoid the greater crimes and shameful deeds, and, when they are angry even then forgive; Those who hearken to their Lord, and establish regular Prayer; who (conduct) their affairs by mutual Consultation; who spend out of what We bestow on them for Sustenance; And those who, when an oppressive wrong is inflicted on them, (are not cowed but) help and defend themselves. The recompense for an injury is an injury equal thereto (in degree): but if a person forgives and makes reconciliation, his reward is due from Allah: for (Allah) loveth not those who do wrong. But indeed if any do help and defend themselves after a wrong (done) to them, against such there is no cause of blame. The blame is only against those who oppress men and wrong-doing and insolently transgress beyond bounds through the land, defying right and justice: for such there will be a penalty grievous. But indeed if any show patience and forgive, that would truly be an exercise of courageous will and resolution in the conduct of affairs.