I am thankful to this site that enables, and enforces, anonymous and civil discussions on controversial . There is a good reason, not just desire to troll, that many discussions are so harsh. It is rarely possible to have discussions between different shitos in person. First, people tend nowadays to live among those with the same opinions and hat fashion. Second, many would be reluctant to ask hard questions of people they know personally. Who wants to have a shidduch ruined just because you are curious about Zionism …
So, the fact that many/most posters do not seem to change their minds is not just a sign of our stubbornness, but also that many come here with well developed opinions that are not easily destroyed by a contact with opposite opinions. Still, I think people at least modulate their opinions in view of what others are saying.
This is also a great place to practice “what to answer an apikoiros” in case you would encounter one IRL, HvS.
I also hope that people who hold by the opinion that most hoi polloi should not go to college or get exposed to different opinions, but think that they are the ones who cna handle it, ask their posek first.