You believe them. You believe the line "I'm not trying to be pro surveillance state", and then you take seriously the points they made which are completely reasonable things to ask, and you engage critically with them, and discuss how those points are compatible or incompatible with the overall stance. It is easy.
As a general rule: to engage charitably with someone you believe the things they say they believe, at face value and attempt to understand how they could come to believe those things.
As a general rule: to engage charitably with someone you believe the things they say they believe, at face value and attempt to understand how they could come to believe those things.