The likelihood of a man who has been blessed with every spiritual blessing in Christ (Ephesians 1:3ff.), who has been filled full in Christ, Who is the Substance (Colossians 2:10), who holds in his own free hands the God-breathed, complete, and fully-adequate Word of God (2 Timothy 3:15-17), being "jealous" of anyone who settles for a big, glittery sham and delusion...
...is about the same as the likelihood of a man with a 32 ounce steam being "jealous" of a bum munching on a plastic carrot.
Maybe the musings and understandings of the Gospel by Northern Europeans of the last century is good enough for you, but if I do ever go for it I would go for true biblical Christianity, the people whose language was the key of the Gospels. I doubt men 1,800 years removed from the Source would get it more right than a peole whose culture and language was tool Christ's Apostoles chose as the basis for the Gospels.
Protestant "Biblical" Christians think they are recovering something that was lost and dig and dig and go back as far as they can to the original and all they do is uncover their hallowness and Orthodoxy's holiness. At least they learn Greek.
I believe Christ set up One Holy, Catholic, Apostolic Church...and there is no other.