Depends on your definition of protest.

If you want to go out and stand on the side of the road with a sign there’s no problem.

If you block people from going to work or going home then you start to gather a little bit of attention

There have been an increasing number of protests where people have damaged power substations, Shot up public places and driven through crowds of people.

The FBI doesn’t have time or manpower to screw around. They’re not raiding someone’s house because some people are noisy about government. By the time they’re Knocking on your door they already have some substantial proof of wrongdoing.