"Brit expat, If you are not following the fundamentals of Islam, you can be muslim in front of the general public, but not in front of Almighty. He provided the rules to follow without any change, not to change or choose according to your likeness or your benefit."

Do you have any evidence that's what God really said?
During some years wasn't Qur'an passed through the people as an oral tradition?

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Meaningfull: Using the same thought, maybe non muslim only marry a muslim girl to show them the correct path, because non muslim men love God/Allah first than women, they are considered "lost" untill they ask forgiveness to Jesus Christ, virgin Mary and God and it's only accepted forgiveness if they don't repeat the same mistake again of marrying a muslim woman (they are unbelievers, so should only marry unbelivers).
Such kind of thought is enough to consider you as a racist at most Western countries.

Only God Can Judge Me
الله فقط يمكنه محاكمتي

I am you and you are me, if you love i love, if you suffer i suffer
أنا أنت, و أنت أنا, إذا أحببت نفسك أحببت نفسي, إذا عانيتَ عانيتُ