I'm of the opinion that self-defense against such an act (pepper-spraying) would be justified.

which is the legal term for law enforcement officer. Given that they were on duty and the incident took place at the facility, I suspect their actions were legal.

What facility is this? Who are the officers employed by? US BoP officers have powers of arrest but they are limited in scope and jurisdiction. They can arrest for any violation on BoP property. They can only arrest off of BoP property for violations relating to escape or assault on a BoP "officer". The sidewalk is a public space and "The person driving the truck was not an ICE employee".

in any case, the state police are investigating.

Not some rounded up and riled posse.

they are not a rounded up and riled posse. They are trained and certified by the state. They have specialized crowd control units.

Watch the video at to OP

I was answering a question regarding the police powers of correctional officers.

It looks to me like they were physically blocking his way?

Fuck your question.

2017 - lol

Is surrounding a person's truck and jumping on the tailgate being an accessory to such?

Is it EVER justified to physically block a street or sidewalk?

Both sides can easily be assholes. You don't have to approve of what ICE is doing to think that anyone standing in front of and blocking a vehicle is pretty fucking stupid. I know I'd probably panic and go either forward or in reverse if I was swarmed. No one, ever, has the right to swarm around a vehicle like that. And what the fuck does 2017 have to do with anything, as if I care about your answer or opinion?

Same thing goes with anti abortion fucks, blocking people. You have a right to protest, you don't have a right to block peoples movement. not that running people over is a good thing, but someone standing in front of a fucking moving vehicle blocking it isn't anything noble, it's being Darwinbait.

I would have dearly loved to drive right over those anti-abortion assholes trying to block Planned Parenthood.