Kufr

Rejecting a fardh of Deen

Q: I want to ask about the reasons which cause the loss of a person's Imaan. There is a man who does not fast in the Holy month of Ramadaan. He does not say prayers regularly. But whenever he says the prayer, he only recites "Ashadu Allah Ilaaha Illallah" in attahiyyaat and ends the prayer. He does not recite complete kalima and Durood etc. He gives the reason that he does so because he does not like reciting anyone elses name in Namaaz except ALLAH. He also does not believe in Qurbaani and says it is better to give money to a poor person than spending money on this event. Whenever something is explained to him-in the light of Sunnah/Hadees, he does not agree/believe and says just tell me where this thing is written in the Quran. About Hajj he once said it is just a way to increase the treasures of the Arabs. My question is that can this person be regarded as a Muslim and if he marries a Muslim woman, will the Nikah be vaild?

Magic and doing tricks with cards

Q: I do magic tricks and I do cardistry (some sort of art form like juggle and make pattern using cards). My local ustaz said its ok to do magic tricks unless it does not make people worship you or think you have supernatural power. But I also found on some website that say it is haram to play poker and playing cards because it will make you tend to do haram things (maisir in this case). However about magic tricks with cards, it does not do anything that makes me tend to do anthing haraam. I also did not like to play poker because it's only a game of chance. I also perform my prayer. I only do it for fun.

Unknowingly uttering words of kufr

Q: I wanted to know what is the consequences of a Muslim who could have unknowingly left the fold of Islam. I uttered a sentence in the gym that said to an extent that there is other gods but I did not mean it in the context that it was said. I was alone in the gym when this happened. As soon as I mumbled those words and realised what I said, I immediately repented because I did not intend to say it, it just came out of my mouth. I'm extremely worried because what I have learned is that Allah doesn't forgive those who leave the fold of Islam. Please advise me because I love Islam and love Allah and the prophet Muhammad (Sallallahu Alayhi Wasallam).

Christianity and Judaism

Q:

1. As we know, in comparison to all world views and the other Abrahamic religions, we are the Ummatan Wasataa. Jews have strict laws (kosher) but little Ilm, belief and theology whereas Christianity is mainly belief and theology but very little law. According to Islam, did Christianity originally have laws, halaal and haraam and/or is this modern day Christianity wrong and changed in the sense that they claim that all is needed is the belief in Jesus as the lord and saviour?

2. Out of all the faiths and beliefs, including Abrahamic faiths, Judaism is the most closest to Islam. If their theology, belief and creed is most similar to ours (Islam), why is it that they will suffer a more harsh and severe punishment in Jahannum?