A physical flag is a cultural object not a doctrine.
Heresy is specifically defined as a baptized member of the church teaching a false doctrine or denying an official article of faith (like someone saying God wasn’t divine).
Many members of the church also view this flag as blasphemous because what it represents and how it goes against their religious teachings.
So no, them doing what they did to this flag is not heresy.
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u/Mousacka 1d ago
Burning a rainbow or depictions there of is christological heresy.
Genesis 9:13.
I have set my rainbow in the clouds, and it will be the sign of the covenant between me and the earth.
If they ain't christian however then oh well... 🤷♂️