Just because someone holds a belief does not in anyway mean they should be left alone to it. That is not who we are as people. We long for relationships and part of our longing is our exploration of each other and who we are in relation to each other. It is easy to get frustrated with someone you don't agree with (over touchy subjects in particular), but we ought to remember that while people are equal, ideas are not. The world will challenge us everyday on what we believe, whether we argue about it or not, and we are always somehow putting our worldview to the test. If we understand certain things about what we believe to be false, then we will fix for that; otherwise, we continue to hold it. We do this because we long for meaning and significance in this life. We search for truth everyday, and we get closer to it (or we think we get closer) through engagement with each other, trial and error, exploring, and sharing ideas.