To call non-Christian cult members such as the Scientologists, “parishioners” is a gross mis-use of the term. In fact, to call members of a Protestant church “parishioners” is incorrect. Neither the Scientologists nor Protestant churches have “parishes” or call their church buildings, a “parish”.
Anglicans have parishes. Are you saying they aren’t Protestants?
Well, I suppose that since the Governments of several countries have collectively lost their minds and officially designated Scientology as a church then that makes them feel entitled to use other religious terminology as well, regardless of how improper it may be.....the ‘slippery slope’ and all. By adopting traditional, accepted terminologies they attempt to legitimize themselves.
The biologically-meaningless physical interactions between homosexuals are commonly referred to as ‘sex’.
Those who adhere to the fascism of political correctness and the endelssly-disproven, regressive policies of liberalism / socialism like to call themselves ‘intellectuals’ and ‘progressives’.
Communist street-thugs here in America like to call themselves “Community Organizers”.
The list goes on and on...by comandeering and stealing the language and twisting it to their own use, fringe and destuctive groups attempt to gain legitimacy and acceptance.