I have read hadiths regarding the creation of the 72 sects out of the 73 sects that will be condemned to the hellfire. In which place are the Shia and Sunni are in these 73 sects? I have also read some hadiths from the Sunni books to follow the "majority" in these hadith. What can we say as Shia in regards to that?

Quran says in 6:116 “And if you obey most of those upon the earth, they will mislead you from the way of Allah . They follow not except assumption, and they are not but falsifying.”

Majority holds no weight in Islam

If I have houses in two cities in which I travel back and forth from month to month would I pray qasr or tamam?

Both of those cities are not my birthplace.

If you consider both of these places to be your homes then you pray tamam.

And what if I go to visit my birth place even though I don't live there?

Then you pray qasr in the place if you dont consider that your home.

If I have houses in two cities in which I travel back and forth from month to month would I pray qasr or tamam?

Both of those cities are not my birthplace.

If you consider both of these places to be your homes then you pray tamam.

And what if I go to visit my birth place even though I don't live there?

Then you pray qasr in the place if you dont consider that your home.

Can a Muslim marry a Christian even though they believe that Jesus is the son of God?

Ruling 2416: And a Muslim man cannot marry women who are disbelievers other than those from among the People of the Book. However, there is no problem if a Muslim man contracts a temporary marriage with Jewish or Christian women but, based on obligatory precaution, he must not contract a permanent marriage with them. As for Zoroastrian women, based on obligatory precaution, a Muslim man must not contract marriage with them, not even a temporary marriage.
A man who has a Muslim wife cannot contract marriage with women who are from among the People of the Book without the permission of his wife; rather, even with her permission, it is not permitted (jāʾiz) for him to marry them.

Is it a sin or some type of shirk to have a picture of an ayatollah in the house for example we have a picture of khomeini on a shelf next to our tasbihs quran and other books?

No it is not a sin to have a picture of a scholar in your house but one should not pray in the direction of those pictures

Since childhood I have heard that when you are buried in your grave, the zameen (ground) squishes you 3 times to the extent that your mothers milk comes out of your mouth. Is this true?

If yes, then dont you think its illogical because we have no other choice but to step on the ground. We cannot fly.

I have not heard this in the way you are presenting it. We do have narrations about the squeezing or tightening of the grave due to ones sins.

My question is should we view the tragedy of Karbala moreso as a praise of the Ahlul Bayt or should we view it in terms of its broader messages (such as justice and imaan and oppression) without so much focus on the Ahlul Bayt? My understanding of Karbala was not with a focus on the ahlul bayt, but of the universal ideas of divine justice and truth. Also how much should we use the wasila of the Ahlul Bayt in dua?

Many lessons can be derived from the tragedy of Karbala, but it also pains us to hear what happened to the household of the prophet (as). This is so when we have developed a love for them.

There is no limit on tawassul.

I was wondering if it was problematic to believe that the Prophet had other daughters besides Fatima. I had learned as a Sunni that the prophet had other daughters besides Fatima, and I have recently learned that there is no evidence for it.
If you believe them to exist does that take away from the virtues of Bibi Fatima?

There are differences of opinions. Some shia scholars believe he had other daughters and some believe only Fatima (as).

It wouldn’t take away status just as the Imams had more children but it doesn’t take away virtues of the their child who is the next imam.

Can you suggest me few books that I can gift my Christian friend who recently married a Shia man and want to know about Shia beliefs and practices.

What do Muslims Believe by Ayatollah Sayed Taqi Modarresi

Christians Who Defended and Died for Prophet Muhammad and his Family by Mateen Charbonneau

Both are available on Amazon

I am having a duscussion with some of my cousins regarding Quran and Shia creed. They are all sunnis (salafi). Their question is most of the sunni muslims follow the recitation of hafs narrated by Asim. The chain of narrators of the Quran are authenticated in Sunni books. But they could not found any authentication of these narrators in shia sources. As far as I know Hafs learned the quran recitation from Asim and Asim learned from Abdur Rahman Sulami who learned from Imam Ali (as) and they were all Shia narrators. But they are claiming that they were all Sunnis and Shias have taken quran from Sunnis. My questions-

1. We all know the Quran that is in our hand is in perfect form which was revealed to the prophet (sa). But what is the proof? How do Shias authenticate this?

2. Is there any different chain of narration of the Quran for Shias different than Sunnis?

3. Shias also follow the hafs qirat and this is the most pure qirat. But how do I prove to my brothers that the narrators were Shias? Is there any specific valid reference?

http://www.english.shirazi.ir/books/the_quran_when_was_it_compiled.pdf