well you can hold an unpopular belief at any intensity. they are independent variables.
For example, I think store-brand (any store brand) potato chips are better than the same flavor/style of the national brand 100% of the time. I infer this is unpopular because the national brand costs $2-3x as much so there is no reason to ever buy them, yet they stay in business and I see people eating them.
But I by no means feel strongly about this. It has been probably 10 years since I mentioned it to anyone. I wouldn't turn down any potato chip no mater how expensive it is. They are all pretty good tbh.
Maybe what you are actually trying to capture is along the lines of: this-is-actually-fascinating nobodyKnowsHowMuchofMyLifeThisTakesUp blooilsmyblood IfeelStronglyThat EverybodyIsDoingThisWrong WhyAreYouSoWrong ThisThingthatILove
or simply StonglyHeldBeliefs.. isn't that what you want to see?
Tho you know what you might really get a kick out of is this podcast: Trampoline Hall. RSS feed. You can find youtubes if you prefer.
Trampoline Hall is a barroom lecture... it asks lecturers to take a vulnerable, theatrical risk and speak on a subject they’re not professionally expert in. Subjects range from absurd and arcane obsessions to heartbreakingly personal stories.