(What you call an "objective fact" here is - as you say - your report of your personal experience. Everyone else would probably use a word more like "subjective".)

https://www.bbc.com/news/articles/cewnwgnqj2qo https://en.wikipedia.org/wiki/London_Trans%2B_Pride

I'm seeing a lot of flags.

Can’t help but notice the difference in sentiment between the flag that represents a people and a flag that represents a nation, especially historically.

Hmm? Which is which? Is this one of those British things people from normal countries don't understand? Like the difference between United Kingdom and Great Britain.