Islam is a works based religion, where the faithful are rewarded by Allah for how well they do the rituals that were made up by Muhammad. The have to pray a certain way and do other rituals according to Muhammads instructions, but there salvation does not seem to be based on how nice they are to their fellow humans. Most insensetive Muslims will not care about this and will think that paradise is going to be ok with a load of selfish people who only care about what Allah thinks about them. It is ok for Muslim men to beat their wives, so what is to stop these wife beaters from also beating the houris, since Allah does not seem to be too concerned if a Muslim man does not treat his wife in the best way possible.
Companies have interviews for the people that they are recruiting to work for them and there is a reason why they do this, because it is a lot harder to get someone out of the company once you realise that they are bad, than to stop them from getting in in the first place. When I mentioned something like this to a Muslim, he said that Allah would just chose the right people, but this is actually unfair, because a person should have the chance to know why they were not chosen, before they are let in, so that they can have a chance to fix themselves. The God of the Bible does this by getting Jesus to clearly state what the reqirements are, for a person to be accepted as one of His sons in His kingdom.

Allah likes murderers:
Sahih Al Bukhari Bk 60.137

Allah is unjust
Sahih Muslim Bk 50.57 n Bk 50.58
Sunnan Ibn Majah Book 37 No. 156

Wife beating:
Surah 4:34
Sahih Al Bukhari Bk 65.463, Bk 78.72
Sunan Abu−Dawud Bk 12.101 (n 102)

Wife easy divorce:
Sahih Al Bukhari Bk 53.5
Sahih Al Bukhari Bk 63.6

Just become a Muslim fighter and you've made it:
Sahih Al Bukhari Bk 56.27
Sahih Al Bukhari Bk 57.32