To be perfectly honest I am a bigot sometimes, I would say have been bigoted with regards to some aspects of feminism in the past, as well as some other things. It's almost impossible to not be on occasion. Any discussion on how society should be ordered is going to encompass economics, race, culture, religion, gender etc and any one of those topics you could spend your entire life in dedicated study of and still miss something.
For some it's easier to just to disengage or just pay lip service to what everyone else appears to be parroting. If you want to stand for something you have to be willing to roll your sleeves up and wade in. Anyone who does this unless they are a some sort of superhuman polymath is going to get something wrong, and be open to some sort of accusation of stupidity and/or bigotry.
The real threat to be avoided is complete and total devotion to any particular ideology. It's not all that relevant what that ideology is, it's the extremism that's dangerous. This is really clearly observable with religious extremism, but it's just as pernicious with political ideologies.