No :).
Its not so much the source, rather your interpretation.
I dont know if theyre reputable or authoritative or not, theyre a small group of Yemenite Jews (their description) living in Israel and maintaining a website.
What is bizarre is your interpretation that Apparently this would exclude Christians from living in the Holy Land. Total nonsense, refuted by present day facts, and an opinion espoused exclusively on white supremacist and jihadist sites, citing your source as proof. Some of the best neonazi sites, I might add.
If youd read the quote you provided, youd note it says it is not just being a member of a denomination in which the majority are believers in the Trinity that is idolatry, but personal idolatrous practice, whatever the individual's affiliation. You, not the source, seem to be suggesting that Christians are idolaters, pretty silly. But if thats your premise, fine, post a vanity in the religion forum, Im sure youll get some answers.