the.com/partisanship
Loyalty to a team that has quietly replaced your ability to think.
means Firm, often unquestioning allegiance to a political party or faction, especially over facts or compromise.
from From Italian partigiano, a member of a part or faction, rooted in Latin pars, part — you back your part, not the whole.
Original senseMeant armed guerrillas, not cable-news shouters.
Brain wiringStudies show loyalty can override accuracy in judgment.
Cousin wordPartisan also names an old pike-like weapon.