Aqaaid

Q: Im a new convert to islam alhamdulilah and have been for around 7 months now. Im so happy and everyday I try and read Hadith and Quranic verses to increase my knowledge. Having said that I came across a few Hadith which has started making me a little doubtful so I really would love if you can help eliminate those doubts. I was reading a Hadith on Umar bin-Al khattab who suggested women covering up then aya was revealed after peeping on wives of prophet when they went to relieve themselves at night. When Sauda told the prophet, she was embarassed and thus the Aya regarding modesty and Hijab was revealed. I also read a similar hadith which stated that slave women dont have to wear the Hijab. It was to rather differentiate between Free women and slave women? How can this be if this is a duty on all muslim women?

On another occasion, When Hafsa found prophet in her bed with Maria the copt an aya was revealed regarding making matters that are halal haram.

So my questions are: How is it fair that slaves are treated differently with regards to Hijab wearing (its not compulsory). Why were verses from Allah revealed after Umar bin Al Khattab suggested? How is having intercourse with a slave permissible (i.e Mariya the copt) without marriage? Some critics would argue that this is to allow the Prophet (sallallahu alaihi wasallam) to do what he wants. A similar thing the fact that he had 11 wives when the maximum is 4. I dont not hold those beliefs of course, i believe it is slanderous and blasphemous to our beloved Prophet (sallallahu alaihi wasallam) but how do I refute such claims.

Q: When a non believer is dead can a Muslim say on authority that he is going to hell fire because we all know he was not Muslim?

Q: My question is if a Muslim watches fictious super hero movies like spiderman and other super hero movies in which they show a super hero getting alive again after death. The superhero that is considered god of thunder, and other fictious movies which show devils, evil spirits (horror) etc. in. Does watching all these superhero movies nullify a person from Islam? I know watching movies is not permissible but I want to know does this nullify Islam? Because lot of children and adult Muslims watch super hero and horror movies of these types and enjoy.

Q: If a woman wants to marry some other person in janna and she do not want to marry her husband which she was along with him in world, is it possible or she can only marry her husband?

Q: I played very good football. My friend told me "nice Ronaldo". I smiled at him, thinking and accepting that I am Ronaldo and becoming happy about it. Ronaldo is a Christian footballer. Did I commit kufr by thinking and becoming happy that someone called me a Christian (by calling me Ronaldo)?

Q: I want to know the ruling for people leaving Islam. Should we kill them? Also please tell me what Quran says about a murtad? Why do people leave Islam eventhough they know the truth?

Q: I want to ask if there is special ibaadat that we should do like fasting and prayers on Isra and Miraj?

Q: I got a paper someone kept in Quran about Christianity. Should I throw it away even if jesus is written on it. Should respect be given to Isa (alaihis salaam) and not throw it?

Q:

1. If someone does kufr (by mocking islam) after that he comes to know its kufr, is it necessary to say shahadah and repent?

Case1: I am asking this because if a person doesn't know its sin, he won't be getting any sin right? Then why is shahadah and repentance required (if he is not gettig sin).

2. If I said to someone that "making fun of islam is kufr and whoever does this is, is a kafir and needs to repent and say shahdah again to become muslim." Instead of knowing the correct ruling, i just purposely told him to do repentance and say shahadah again to become muslim. Did i commit kufr by making halal haram by telling someone to do an act which is not required and telling them only if u do this then you become muslim. 

Q: I am a hanafi but I don't know I'm getting these kind of questions about mathabs for so many weeks now, like for example, why am I supposed to read salaah if I'm a hanafi when its 10+ days of haydh and I'm not supposed to if I'm a Shaafi or like why would I be a sinner if I didn't read salaah before Shaafi times end and and I'm not a sinner and I dont have to read qadha if im a Hanafi

1. I fail to understand why there are so many masaail that contradict each other so why do they?

2. Is qiyaas from sunnah?