I agree Simon. The question is "why do you believe as you do?". Then there is a basis for discussion. If a person can't explain it then it's more difficult to engage but that's their problem - they can either acknowledge that they can't explain why they believe something or start the journey to understanding their own beliefs and perhaps changing them.
A person may have beliefs based on their own experiences. The difficulty here would be convincing someone else of the validity of those beliefs, who hadn't shared that experience or had a different view of it. That won't be an issue unless they attempt to convince the other person that their beliefs are in some way 'a truth' for everyone.
Perhaps the OP can explain why they hold their beliefs in a way that might lead to discussion. It's less likely to happen if they see the environment as fundamentally antagonistic.