If we accept apostasy, we must accept that it weighs us down. In evangelizing, we must prove to honest men of reason that this terrible burden is a reasonable one.
It is a terrible burden because it means God’s Own True Church, founded to redeem men from sin, could not withstand sin. If you are to stay Christian, I don’t see any honest way around this.
You may deny reason, but you deny a gift of God. You may deny honesty, but then you do not worship Truth. You may deny evangelism, but you deny loving your neighbor.
Because such crosses deserve names, if you do accept the apostasy hypothesis I give you the name apostasist. Your religion foundationally includes this specific article of faith: the True Church, despite being founded by God Himself, was lost when doctrines were changed, altered or lost, either immediately or over the centuries. Your company includes non-Catholic Christians, various sub-Christian and non-Christian sects and certainly a few cults.
Even as you seem to interpret Creation soundly, or more soundly than those you call apostates, your account of history interrupts, striking a discordant note. (You will not find Baptists among the Arians; you will find only Arians.) How suppressed the Real Deal Forgotten for Centuries must have been, and How Wise you must be to have finally puzzled it out!
And yet, if we are to spread this Gospel, would a reasonable man believe us any more than the sandwich-board Jeremiah of Times Square? Your pearls of wisdom must surely be of great price, for you have sold a reasonable interpretation of history for a mess of conspiracy theory.
… and these falsifiable, ahistorical, minority novelties, these new and unheard-of-before pearls of purported wisdom, are supposed to be of the True Church? One more burden to bear, it seems to me.