Peace be on you. I humbly believe that God revealed religion (His attributes and commandments) since the very first human (which was made after long creation+guided evolution);
= along the way various religions existed,
= then they corrupted (since raw capacities need hard work to go up morally, people slowly sank to low, they spiritually gravitated)
= then new Prophet (the most capable pious person of his time, able to get revelation) was sent to reform them.
That is why I believe the currently established religions were once true religions of their times and they were from One God and taught Unity; now most are not in original nascent state because of deviations and taking metaphors literally; attributes of One God are considered as small gods etc or associations are made with One God.....
If one did not get the light of final message (Holy Quran) with a true reason and practice their religion's original teachings, they will get salvation. (ch 5 , verse 70 alislam.org/quran)
Perfection of God lies in compulsory uniqueness and best-ness. We are all ctraetures of One God. Holy Quran call it Allah....According to Ahmadiyya Promised Messiah and Mahdi (@alislam.org) Allah in Holy Quran is the Perfect Being Who is Rightful Deity, Possessor of all perfect attributes, Free of all weaknesses, The One with no associate and The Source of all blessings.
So I believe currently established religions were once free of corruption but now they are not free of human interventions. Only Holy Quran is in its original form and it does contain essentials of all previous versions of religions. (No hard feelings)
Other gods do not exist.....If they had, universe would have collapsed. Centre is perfect and one.
Thanks.
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Thanks.