Questions

For the answer to question 2. 

From the beginning until now there're more women than men, this is more possible for this hadith.

In addition, many rules from Allah are intentionally or unintentionally violated. One example is the command to close aurat (genitals) such as Hijab (headscarves) etc.

Unlike the righteous women, they will get the same paradise with righteous men.

1. Sunan Abi Dawud 4717 Grade Sahih

Now I asked a few people regarding this an everyone gives different answers, why would God put a new born girl in hell just because she was murdered by being burried alive? 

2. Sahih Muslim 79a 

"O womenfolk, you should give charity and ask much forgiveness for I saw you in bulk amongst the dwellers of Hell. A wise lady among them said: Why is it, Messenger of Allah, that our folk is in bulk in Hell? Upon this the Prophet observed: You curse too much and are ungrateful to your spouses. I have seen none lacking in common sense and failing in religion but (at the same time) robbing the wisdom of the wise, besides you. Upon this the woman remarked: What is wrong with our common sense and with religion? He (the Holy Prophet) observed: Your lack of common sense (can be well judged from the fact) that the evidence of two women is equal to one man, that is a proof of the lack of common sense, and you spend some nights (and days) in which you do not offer prayer and in the month of Ramadan (during the days) you do not observe fast, that is a failing in religion."

This hadith seems to be degrading women, additionally one of the main parts I want to focus on is towards the end where it says they spends some nights and days of which they do not offer prayer or fast during Ramadan. From my understanding the reason why women do not offer prayer on some days is because of menstruation, so why would they be punished for a natural occurrence that God gave them, it is not there fault that they have a menstrual cycle they cannot choose when it happens and cannot choose to stop it or start it. 

3. In the Quran 4:34 

"Men are the protectors and maintainers of women, because Allah has given the one more (strength) than the other, and because they support them from their means. Therefore the righteous women are devoutly obedient, and guard in (the husband's) absence what Allah would have them guard. As to those women on whose part ye fear disloyalty and ill-conduct, admonish them (first), (Next), refuse to share their beds, (And last) beat them (lightly); but if they return to obedience, seek not against them Means (of annoyance): For Allah is Most High, great."

For the answer to question #4.

(Quran 8: 12)

This verse explains when the battle of Badr was raging, then Allah commanded the angels to strengthen believer's hearts that they should not retreat even though the number of opposing troops is greater and their weapons are better.

In this verse there's the word سَاُلْقِيْ, meaning "someday I will give", it means that if they die they will feel fear and endless regret in the hereafter.

In addition, there's the word فَاضْرِبُوْا meaning "then beat" (not to cut off as you say) opponent's necks to be easily paralyzed.

And also beat the opponent's fingers so that the weapon being held by the opponent falls.

So please remember that this verse when the war was raging and also not because of they didn't follow the teachings of Islam.

In fact Muslims were challenged by the opponents in the hope that Islam religion will disappear from the surface of the earth, but what happens was just the opposite.

So this verse only applies when it is at war.

Asep

For the answer to question number #2:

No one knows the real Injeel exactly, because it has been gone since 325 AD