The trouble with symbols and flags is the use they get put to.
Take the Mesopotamian and Hindu symbol for peace, prosperity and wellbeing. It was used on coins thousands of years ago, it spent most of history meaning nothing but positivity.
Then the National Socialists of Germany decided to use it. And it’s on of the most hated symbols in Western civilisation. So much for the swastika…
The Union Flag and the Flag of St George are fine until a bunch of racists, thugs and neo-Nazis decide to wrap their every enterprise up in it. Then they become tarnished by association.
Outside of sporting events or the Queen’s Jubilees, I don’t think I’ve ever seen normal people with either flag. It would need a lot normalising flag use to separate it from racist rallies at the minute.
(nb - I am not equating the Union flag to the swastika, I’m showing a drift of association)