The concept of life after death.
The belief of hereafter is amoung Muslims only. Allah the All mighty , the true and the only God has explained us through our prophet that this life is Just a test for human. Go good to earn good on the day of judgement. And if a person dies doing good deed or while protecting his Deen (religion) he/she will enter Jannah (heaven) without being judged for his small sins. He is called martyrs and they ain't considered dead. They are amoung us and in the highest place in Jannah. Insha Allah. Where as non Muslims thinks they only live once and they can get over their sins without being asked by their creator. ٱلَّذِى خَلَقَ ٱلْمَوْتَ وَٱلْحَيَوٰةَ لِيَبْلُوَكُمْ أَيُّكُمْ أَحْسَنُ عَمَلًۭا ۚ وَهُوَ ٱلْعَزِيزُ ٱلْغَفُورُ ٢ ˹He is the One˺ Who created death and life in order to test which of you is best in deeds. And He is the Almighty, All-Forgiving. (Al-mulk 67:2) وَلاَ تَحْسَبَنَّ الَّذِينَ قُتِلُواْ فِى سَبِيلِ اللَّهِ أَمْوَتاً بَلْ أَحْيَاءٌ عِندَ رَبِّهِمْ يُرْزَقُونَ (Think