"Offended" is a bit of a strong word.
Many trans folks are, understandably, bummed out when gendered terms that refer to their AGAB are used to refer to them.
I don't think there's anything wrong with trying to avoid causing that brief moment of dysphoria. That just feels like a thoughtful and kind thing to do.
Did you read the article?
The article describes multiple queer activists and groups supporting BDS as a component of Pride.
The article also describes the direct link between BDS and Pride.