Earlier quoted context omitted.
No. > Definition of bigot > : a person who is obstinately or intolerantly devoted to his or her own opinions and prejudices > especially : one who regards or treats the members of a group (such as a racial or ethnic group) with hatred and intolerance https://www.merriam-webster.com/dictionary/bigot
Not sure what the 'no' is in regard to. That's entirely aligned to my comment. Or did you think obstinate devotion to opinions and prejudices only manifests in the the group of people you happen to disagree with?
I don't dispute that it's extraordinarily difficult to get people to change political opinions, especially on the fringes. That was never my contention, I made that pretty clear with the example of bigoted communities I chose being white supremacists. Not sure how you could misread that, unless you wanted to.