@awais 666
dear, in my opinion following are the answers to questions:

1. Yes obiveously Allmighty Allah will decide who is proper muslim who isn't, by the deeds we perform here in this materialistic world.

2. Here in this question you both @awais 666 & @marwatone are ok.

3. At this point i would say that until and unless we won't understand the message of Quran the message sent to us through His Prophet, he who is Rahmat ul Alameen we won't successed, to say let us leave every thing upto the Allah would not sound good because Allah have given us every posible mean to decided the right and wrong.