When someone brings their opinions to a conversation, armed and ready for battle, it’s easy to react or get defensive.

How about taking a moment to:
1) Think through how you can disarm the other person and voice your opinions 
    tactfully.
2) Decide if you want to continue with the conversation, redirect it or resume it at
    a later time.

Remember, you don’t have to engage in the conversation.  You can always make a graceful exit from the conversation!