It just means "causes a problem". I have proposed the use of "marginalizing" as a replacement for "offensive" in the sense of "reinforces systemic biases again

It just means "causes a problem". I have proposed the use of "marginalizing" as a replacement for "offensive" in the sense of "reinforces systemic biases against certain groups of people", after I saw character on a British procedural say "Don't call somebody 'hot' or 'a lush'; it's marginalising."