> What crime are they committing? <
One characteristic of a fascist/socialist state is that they simply make crimes up.
Vagrancy?
They declared the protest as ‘unlawful’ which, as you point out, they make up whatever laws they want.
Authorities are trying to avoid going Bull Connor on the truckers. If they get violent, then it’ll look like government overreach. So they’ve ‘stood down’ and done little so far.
Look for a false flag bit of violence they can blame on the truckers. Their version of a 1/6 basically.
January 20, 2017 … a real riot … Democrats are very, very forgiving.
January 6, 2020 … they won’t enforce trespassing in many Democrat run cities but they’ll throw people who call them out on election theft in the most miserable jail they can find over “trespassing”.