I don't know what you mean by 'real' Christianity seeing that for 1600 years before the rise of Protestantism there was a long tradition of praying for the dead in the church. The sola scriptura movement with its various emphases is a comparatively later phenomenon. Here's a post from another steemian who used to share your view and has now changed - https://steemit.com/life/@creatr/do-you-pray-for-the-dead-ruminations-on-god-s-sovereignty-over-time. Some things are not always so cut and dried, my friend.