Right now you can in fact express pro LGBT or anti fascist opinions despite the administration's efforts to stop you precisely because there are no such regulations.

Had a previous US administration thought that the US is a stable and functional democracy that can be entrusted with such a law, you will be in trouble.

It's not for a lack of laws granting the necessary powers; anti-terror laws passed in the wake of 9/11 allow for basically arbitrary use of warrantless surveillance and specifying any enemy as a terrorist. The reason this admin hasn't been successful in vindictively prosecuting its enemies is because they've only captured the Supreme Court, not the majority of the legislature. It's up to judges to interpret the law and decide if it's being applied appropriately. If you write an anti-psyop law it's far from impossible to make clear in the text what sort of organization it is meant to apply to. That's the case for all laws. Where it breaks down is when the legislature changes its interpretation standards. And at that point any law can be interpreted to mean anything and rule of law breaks down, so it doesn't really matter what laws you have or don't have on the books.