No, I think it's fine because the straight person probably just wants to be a supportive ally to non-binary people, just like how non-LGBTQIA+ people can fly the rainbow pride flag to show support for LGBTQIA+ people, and white and people of other races can fly the BLM flag, or how non-Ukrainian people can fly the Ukraine flag in support of their resistance. Expressing your opinions and showing your support for a cause is not anything bad, and I do not condone censorship. Hopefully this clears it up.