Namaste my brother,
Our orthodox Christianity of today or probably any denomination or sect would probably look pretty confusing to Paul, or Peter, or Jesus...
Islam has quite the variety of sects or haven't you noticed the discussion between the Shiia and Sunni and Almahdi and not wahabi and..... then there are the variety of Sufi sects...
As does Judaism, Orthodox, Conservative, Reformed, Reconstruction, Renewal, and the indendent unaffiliated and...and...and...then the variety of Cabalists..
Hindus, Buddhists, Taoists, Wiccans, Pagans, they all have their individual varieties as time goes on....and the debates about what is right, wrong, similar or different in Christianity have been going on for what 2,000 years?
And you my friend are not alone in knowing all the answers, and knowing for sure who is right and wrong, many do. But as years of study turn into decades, and lay preachers turn into ordained low and behold their views often change, along with their denominations, sects, and beleifs.
In my belief system it is actually impossible for an individual or group to blaspheme the lord or irritate G-d...spirit is above that.