You have the right to be left alone in private. In a public institution like an education setting that doesn't apply. You do not have to attend any event you don't wish to - you can opt out. That is your choice. Disagreement is not oppression and feeling like someone doesn't agree with your world view isn't oppression. Even feeling oppressed isn't oppression. Subjective and objective oppression are entirely differently and the world cannot be run on the former. I had the right to be left alone after I made my comment - but you have subjectively oppressed me with your comment. Should I ban you? Or should you ban me? Who should speak, both of us, neither of us? And more importantly who should adjudicate who gets to speak?

I happen to think that most religious people are fundamentally dishonest about what they believe and often disingenuous when you factor in how they act - but that is by-the-by, they are welcome to say their piece. My personal views on their approach to this shared earth are neither here nor there - and if I like, I can challenge them in a public setting. If they follow me home and continually harrangue me in my private life - that would be harrassment. My private life is my 'safe space' - the public sphere is a shared space.