Abusing and cursing people

Q: How would have our Nabi (Sallallahu Alaihi Wasallam) reacted to those people who would hurt his parents if they were alive. Hurting to the extent destroying their social life, giving physical pain, etc. Can we pray for there destruction who have troubled our parents so much. Except dua we have nothing

Divorce in court

Q: I wanted to know if I file for divorce in the court in the West so if I sign and my wife signs and the court gives divorce and we become legally divorced. Does it mean we are divorced according to sharia too or court divorce does not affect the Islamic relation. And in case if it finishes our marriage relation by sharia. So then if we decide later to get back as wife and husband as in case we sort out what is the process by Islamic way.

Doubts

Q: I was thinking about my medicines then I said 'ye medicines ka asar nahi, Allah ka asar hai'. Is it wrong to say that?