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I am a revert and I have some questions regarding Ahaadith

Q: I am a revert to Islam, and I'm still learning..however I have come across some hadith, that contradict the teachings and character of our beloved Nabi (Sallallahu Alayhi Wasallam)..one example, the Prophet (Sallallahu Alayhi Wasallam) told his son to divorce his wife so that he (saw) could marry her for himself..another example is that he ordered the killing of 100's of Jewish men because they didn't accept Islam and allowed his men to rape the women of those slain men..my question is: Are all hadith true and authentic, and if not, which hadith should we follow?

ثلاثون كذابون قبل يوم القيامة

س: كثر في زماننا أشد الإكثار - الناس الذين يقرون عن أنفسهم أنهم من الأنبياء، و يخرج من بعضهم الإستدراجات (و أكثرهم يرغبون بذلك المصالح الإقتصادية). أنا شخصيا رأيت في التلفاز الرجل الذي قال عن نفسه - أنه الرسول عيسى (ظهوره الثاني)؛ والناس الذين يقولون عن أنفسهم - أنهم الظهور الثاني للنبي عيسى - في زماننا كثير جدا (خاصة في الديار النصرانية). أظن أن ذلك من علامات تقريب يوم القيامة. هل هناك أحاديث ثابتة تخبر عن ذلك (يعني عن إكثار الناس الذين يقولون عن أنفسهم انهم من الأنبياء - قبل يوم القيامة)؟

Love for the Arabs

Q: Is there any kind of hadith about Arab people like, Don't use any kinds of bad words on arab people because Nabi (Sallallahu Alayhi Wasallam) is an Arab, the holy Qu'an is in arabic and next language will be Arabic? 

Is this story authentic?

Q: There is story about a sahabi who went out in path of Allah and prior to leaving said regarding his pregnant wife: i leave what is in the belly of my wife in Allah's care. When he got back he found that his wife had passed away but his child was found living next to the grave. Is this story authentic?

Memorising the Qur'an

Q: Could the following be verified with a source please:

  1. While memorizing the Holy Quran, If a person passes away the Angels of the grave will assist him in completion.
  2. The place on the body which received hiding while doing hifz will not be burnt in the fire of Hell.

I received the following on BBM

Q: I got this on bbm:

One day, Sayyidina Rasulullah (Sallallahu Alayhi Wasallam) saw a bee and asked it how honey is made. The bee replied that they go out to gardens and collect pollen and nectar from the flowers in their mouths, and then fly back to the hive and release it, and that makes honey.

Sayyidina Rasulullah (Sallallahu Alayhi Wasallam) then said to the bee, “But the nectars have different tastes… some are bitter and others can be sour. But how do these become sweet?”

The bee replied, “Allah has taught us to recite ṣalawaat upon you after we collect the nectar, until we reach our hive. The sweetness of the honey is the blessing of the ṣalawaat we recite upon you that turns something so bitter into such sweetness.” That's the greatness of our Beloved Prophet Muhammed (Sallallahu Alayhi Wasallam)

Validity of a Hadith

Q: I want to know the validity of the below hadeeth I found in the following site: 

Powerful and Virtuous Dua for every need (Must read)

Source: http://islamicexorcism.wordpress.com...hamd-e-illahi/

In the book “Key to the Garden of Bliss (Jannat Ki Kunji)” Sahban ul Hind, Hazrat Maulana Ahmed Saeed Dehlwi RA, has quoted the following hadith:

Hazrat Abduallah bin Umar [RA] says, that the Prophet [SAW] has said: Whatever a man asks Allah on reciting the following will be given, one thousand virtues are written in his record and he is advanced one thousand stages, while Allah appoints 70,000 angels for him to pray for his forgiveness till the Day of Judgment. The phrases are: 

Alhamdu Lil-la-hil-lazi Tawa-zoa’a Kul-lu-shai-in Bi Az-matihi Wal Hamdu Lil-la-hil-lazi Zal-la Kul-lo-shai-in Li-Iz-zatihi Wal Hamdu Lil-la-hil-lazi Kha-zoa’a Kul-lo-shai-il Li Mul-kehee Wal Hamdu Lil-la-hil-lazi Is-tas-la-ma Kul-lo-shai-il Li-Qud-ra-tihi 

[All Praise is due to Allah, before Whose Grandeur every thing is humbled and All Praise is due to Allah, before Whose Greatness every thing is subdued and All Praise is due to Allah, before Whose Dominion every thing is abased and All Praise is due to Allah, before Whose Strength every thing surrenders] [Hadith Book: Al-Mu’jamul Kabir by Tabrani]

أشد الناس عذابا يوم القيامة عالم لم ينفعه علمه

س: وقد جاء عن النبي صلى الله عليه وسلم (أنه قال " من أشد الناس عذاباً يوم القيامة عالم لم ينفعه الله بعلمه " هذا ا حديث ورد في كتاب السيوطي "أمر بالاتباع و نهي عن الابتداع"، و لم يذكر مصدره و در ة صحته. هل تدرون هذا الحديث و درجة صحته و مصدره؟ و ما شرح هذا الحديث؟