No. Attributing bigotry to an entire fanbase—any fanbase—is intellectually lazy and factually wrong. Rangers supporters number in the millions globally; their views span the full political and social spectrum.
The association stems from historical sectarian dynamics in Scottish football: Rangers (traditionally Protestant/unionist) vs. Celtic (traditionally Catholic/Irish republican). Some Rangers fans have sung sectarian songs, displayed offensive banners, and engaged in discriminatory behavior. The club has faced UEFA sanctions repeatedly.
Rangers FC officially condemns sectarianism. The "Follow With Pride" campaign, strict ground regulations, banning orders, and community outreach (Rangers Charity Foundation) aim to change culture. Progress is measurable but incomplete.
Condemn bigoted behavior wherever it occurs. Don't smear millions of individuals for the actions of a minority. That's how prejudice works—and fighting prejudice with prejudice fails.