Quoting a fairytale to determine if something is good or bad is a bold strategy. Try using your own ability to think one time. Feel like you are in a closet wanting to come out but a silly book tells you can't celebrate.
It's ok to be proud its a perfectly natural and healthy emotion. Like being proud of your kids, taking pride in your work, or the community etc. That should of been your first clue that the fairy book is using faulty logic to justify hate.
All the more reason to put it aside and join in on the celebrations.
So tell me, what are your thoughts on a male wanting to identify as female and then they use that to compete against the women in Sports instead of the men? They are pretty much guaranteed to take first place. Is that what you are celebrating?