How effective is defensive behavior when you are trying to convince someone that your point of view is more valid than their point of view?

If you want to piss them off. I know that when I'm in a discussion with someone and they start playing victim in order to "win", it generally t's me off even if I do let their game be the most important thing.

However, people who develop that "victim" thing usually do so because they've found it works for them.

just state facts that are true, that's defensive, I think

your point of view is never more relevant than another person's...

sometimes its effective