Stei'awtliyrl, Jim, Bill, & others..
Our ATU Virasin Faith followed much of the MT-TU tenets, but like yours, allowed travel & evangelizing. Dlan was the Holy Center, the Mecca/Medina/Jerusalem of the Faith.
Our ATU had Virasin Missionaries as well. I used them as a random encounter in the MT-adventure Arrival Vengeance on Warinir/Daibei, matter of fact.
We changed the tenet to "die on Dlan" to "To be buried on Dlan." Thus, like Najaf, Iraq, the cemetery grounds around the Holy City there were immense. Our Dulinor, even though taking his own life, thus ascended into Heaven. His daughter Isis, in order to sway the Old Guard of the Faith ensured that as many who had served in the Federation Forces & died in battle (against non believers) were returned for burial. Non-believers like the USSR Communist Party WW2 example didn't get such treatment, good mail, etc. Isis herself, as a matter of state became member, and did not travel off world openly after taking the Archduchy.
Needless to say, there was a predictable spike in Virasin believers amidst the Fed. Ilelish armed forces. Not all took the Orange, many still wore the fearsome black.
The 1118 Synod was in our ATU, to seek dispensation for the Agnostic loyal (they who wore the Black) to The Federation & Dlan, to be buried on Dlan, and seek entrance to the afterlife (much the way a certain modern day faith can shift your departed loved ones into their church with the stroke of a pen & a monetary donation).
This perversion of the faith caused Ilelik Kuligaan to publicly denounce Isis as "leading the Church, Ilelish, and the Imperium to an eventual pyrrhic end; not to an afterlife of understanding, but a future of death, damnation, and misery."
Understandably he was "excommunicated" (in absentia, as he wisely fled) and remained a hunted man up until 1128 when he dropped completely off the radar of Virasin jihadist agents.
Our Isis saw her bid for power not only as righting a wrong of how her father had died, (Vengeance against Lucan, & later then Strephon) but also as a jihad to cleanse the immoral from power in the latter day, corrupt Third Imperium.
The Verge breakdown/ secession came about in our ATU for the predictable reasons that the Federation of Ilelish over taxed them in ships, manpower, for very little in return. The basis of what they'd harnessed prior to the Verge "mini-rebellion" was what became the ill-fated "Coronation Fleet". Ironically/ Coincidentally (as per MJD's 1248 OoTD) it was to Verge that elements of Isis's faction fled to to escape the hell that soon became Ilelish, only to 'wink out" about 1140.
How would portray Kuligaan's defection Stei'awtliyrl? Jim? Bill?