This man felt that since he is a homosexual, that he is special and can say or do whatever the hell he wants.
What does his homosexuality have to do with the issues of either abortion, or laws relating to gathering on a public sidewalk to express opinions on an issue???
He is indwelt by a demon of non-sequiturs?
He sees efforts to restrict abortion based on Christianity a parallel threat to potential restrictions on homosexuality.
Christianity condemns both, so he sees these devout Christians as a personal threat.