Sorry, but your Koran doesn't even come close. How many different religions, creeds or faiths are there out in the real world ... and how many different ways are there to interpret any one of them? In what you place Faith is entirely for your own comfort and between you and whichever God you choose. Though it may seem like The Answer for you, it isn't for a large percentage of the world's people. Wars have been fought and empires have crumbled as the result of just such arrogance.
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The religion of God is one single religion, but then was perverted from its pertaining to God alone to be a religion of associating others with Him.
The duty of the apostles is to assert this First Commandment that God is One without any associate or equal.
This is in the Quran 2: 213
كَانَ النَّاسُ أُمَّةً وَاحِدَةً فَبَعَثَ اللّهُ النَّبِيِّينَ مُبَشِّرِينَ وَمُنذِرِينَ وَأَنزَلَ مَعَهُمُ الْكِتَابَ بِالْحَقِّ لِيَحْكُمَ بَيْنَ النَّاسِ فِيمَا اخْتَلَفُواْ فِيهِ وَمَا اخْتَلَفَ فِيهِ إِلاَّ الَّذِينَ أُوتُوهُ مِن بَعْدِ مَا جَاءتْهُمُ الْبَيِّنَاتُ بَغْيًا بَيْنَهُمْ فَهَدَى اللّهُ الَّذِينَ آمَنُواْ لِمَا اخْتَلَفُواْ فِيهِ مِنَ الْحَقِّ بِإِذْنِهِ وَاللّهُ يَهْدِي مَن يَشَاء إِلَى صِرَاطٍ مُّسْتَقِيمٍ
The explanation: (People [at the time of Adam] were [all of them] one sect [of monotheists; none of them did associate with God, then following the time of Adam they differed and varied and associated with their Lord],
so God sent prophets with the glad tidings [to whoever obeys Him], and the warning [to whoever disobeys Him and associates others with Him],
and sent down the [Heavenly] Book with them, indicating the true [religion]; that [each prophet] might judge [his] people concerning their deviation [from monotheism, and that they followed various false religions and doctrines, and to guide them to the true religion];
but none deviated from [the heavenly book] save those [religious leaders: Jews and Christians and others, who sought after the World and the position and leadership] given the [Scripture] even after the manifest [signs] had come to them, due to their 'greed and their wronging each other' [each seeking after the position and leadership];
so God, with His permission [He permitted His angels to inspire whomever He please], guided the believers to the truth from which they deviated; for God guides whom He pleases to a standard path [of monotheism.] )
A true prophetic tradition said:
"Jews 'deviated and divided' into 71 sects [the word "seventy" only indicates the large number of divisions, and not the counting of 70 exactly],
and Christians 'deviated and divided' into 72 sects,
and my nation will 'deviate and divide' into 73 sects;
it is only one sect among these that will be saved, while all the rest will be in Hell."
Therefore; it is very serious: it is only one sect that will be saved: it is the sect that follows the monotheism and exclusively resort to God alone, and believe in all the apostles and in all the heavenly books; these may hope to be saved; while all the rest will go to Hell.
eanassir
http://man-after-death.site.io