I kinda consider anything that split off from the Eastern
Orthodox as "not really Christianity", even though I'm agnostic
at present, so whatever the Roman Catholic church did post
Schism and all of its splinters did after the 16th century, are
just pretending.
Islam prior to the that 21 yr old Sultan who wanted to "return
to Islams roots" in the 15th century / "Fall of Constantiple" -
he kinda ruined Islam as well. The stuff before 15th century
Islam I consider valid enough, but post Sultan what's-his-face,
are just the Islamic version of Roman Catholocism - and
nowadays, Protestantism with all the damn subgroups writing
their own ways ... which, are ultimately, a bit of a joke and
missing the point most of the time.