@akkakk
"there is absolutely no other 'religion' which has that simple, that clear, that black and white an offer for eternal salvation (eternity in heaven as per the original OP's post) and which requires no actions from the individual other to believe and accept it..."
except... your Christian beliefs on Sola Fides are derived from a much later interpretation of the Bible, which is not Biblical, and was not the understanding of early Christians in the Church (some taught directly by the disciples) who wrote extensively on the teachings passed on to them and on the writings of the New Testament.
James 2:20–26 (ESV): Do you want to be shown, you foolish person, that faith apart from works is useless? 21 Was not Abraham our father justified by works when he offered up his son Isaac on the altar? 22 You see that faith was active along with his works, and faith was completed by his works; ...24 You see that a person is justified by works and not by faith alone....26 For as the body apart from the spirit is dead, so also faith apart from works is dead.
What you talk about in your post is one interpretation of Christianity that can be traced to after the Reformation and into later years ... but not believed by early Christians.
The same goes for Sola Scriptura, Literal translation of the bible, Jesus instituting the Church, Baptism for the forgiveness of sins, assurance of salvation, once saved always saved, election of individuals to heaven (and so others to hell), the Eucharist ... etc etc.
This is an unfortunate "feature" of Christianity .. that some Christians judge other Christians as not being Christians based on their own "personal" belief and the belief that this comes from their own "personal" relationship with God.
Presenting your view as fact and absolute truth does cast a shadow on your posts.... and I believe is not helpful to Christainity as a whole.