Conditions for the validity of Nikaah

Taking a second wife

Q: I had a question about marrying a second wife? I told my wife I wanted to marry another wife and she said I would need to divorce her first? She would not accept that second marriage! What is the ruling on this?

Marrying a Hindu

Q: I loved a girl since one year and she also loves me but the problem is that she is of Hindu religion and I want to make nikaah to her. Can I do so without the interference of her parents?

Nikaah without witnesses

Q: My question is on the validity of Nikaah. Is the nikaah valid by mere confession between a boy and a girl that they accept each other as husband and wife? without any supplication or dua ?and without anybody's permission? And also what will be the kaffara if they are doing so?

Marrying a shia

Q: I need your help and advise regarding shia Sunni marriage. I am a Sunni. I know there are various types of shias and some of them constitute kufr. I want to ask you that if a shia who has the same Qur'an majeed as ours only the pronunciation is a bit different, he respects the 3 khulafaa-e rashdeen too other than Hazrat Ali, doesn't believes in anything that constitutes kufr for example giving hazrat ali (ra) the same status as Allah (naosobillah), saying that Muhammad (saw) mistakenly became the last prophet, the list goes on. Everything is almost same except for a few differences that we all know for example a bit varied way of salaah, attending majalis, regards the ahly byt etc. In other words according to me, I don't see anything that constitute kufr or is considered as a high deviation expect for difference of opinion as mentioned above. But in our kalimah after LA ILLAHA ILLALAH MUHAMMADUR RASOOLALAH he adds Aliwaliullah. Something with only this intention that Ali is the wali of Allah and our imam. Is it permissible to marry him? Because I heard that adding to the kalimah can also make a person out of the fold of Islam and thus marrying him would not be jaaiz from my side and I would be living in an unlawful relation. But having said that, I also believe that the intention is what matters more than actions as our prophet (Sallallahu Alayhi Wasallam) mentioned this. And of the only intention of adding is that Hazrat Ali (Radiyallahu Anhu) was imam and they are his followers, then is the marriage jaaiz ?I would like to know your opinion. I know that its is disliked to marry them, but would the marriage be jaaiz or not that's my only concern right now.