If you frame it as ignorance, the next step is to enlighten the other side with the factual arguments you want to make. "The threat landscape isn't as bad as you claim it is." "Mass surveillance has downsides that are worse than you would think." If you assert deceptive intent, it kind of slides into character attacks.
It's true that people sometimes don't argue in good faith, and it's fair to question hidden motives. But I think if you have better facts, you should keep arguing the facts.
It's true that people sometimes don't argue in good faith, and it's fair to question hidden motives. But I think if you have better facts, you should keep arguing the facts.