[jh721]

> "shouldn't [unless]" is either a past tense, thus an illogical consequent to the present tense, or it is a hypothetical, irrealis or desiderative subjunctive in which case it merely implies that someone should not be "spying", in effect.

Could you explain this a bit more to a non-native speaker like me? I'm assuming it's not a past tense for certain. From the second definition in [1] (used in auxiliary function to express obligation, propriety, or expediency) and the examples, it seems to me "shouldn't" here could mean that "be subject to government scrutiny" is the opposite of "obligation, propriety, or expediency". I understand the sentence as: if someone is not spying, subjecting their personal beliefs and political affiliations to government scrutiny is not the correct thing to do. Then why would it

> implies that someone should not be "spying"?

[1] https://www.merriam-webster.com/dictionary/should