Question To Muslims

Assalamualaikum to all followers and readers,


Today, I came across a video on You Tube which has this title to it "Questions To Muslims". The person asked these questions with all seriousness in hope to understand Islam better. So after reading the questions, I really felt like replying to this person whom I believe might  be an Atheist. However, I also felt like sharing it with you all out there, something like a discussion on this. 


Here are the questions....Leave your opinions/answers in the comment section ok? 


1- Is there punishment for apostasy in islam? what is it?

2- What is your interpretation of sura 4:34? (Surah An-Nisa': Ayat 34)

3- Why is it ok to have multiple wives, but not multiple husbands?

4- What kind of government would be best for Muslims to live under?

5- Where are the 5 pillars specifically mentioned in the koran? If they are not, then how is the Koran complete?

6- can someone be gay and muslim?

7- What is the best proof that God exists other than the Koran?

8- Is the way the koran dictates nonbelievers should be treated just? Why?