You're going to need to be able to deal with people who bring the war to you. However you resolve that is up to you, but the situation described - in which he thinks of it as a war, whatever you think - is not unrealistic.

And you will have occasion in life to need to actually convince someone of something. At which point you can approach it in a number of ways, e.g.

1. War of ideas (which there are any number of ways to conduct).
2. Selling the idea (just like selling something for money).
3. Do nothing and let them stay unconvinced (a sometimes neglected alternative, particularly for nerds).