I assume they are trained to hold their guns like characters in a video game then.
Poorly vetted, poorly trained, poorly equipped, save for their firearms. What could go wrong? You know, besides everything.
The gentleman said he felt like he was being confronted, not by law enforcement, but by a criminal gang
And that's why. Real law enforcement is required to attempt to de-escalate before applying reasonable force. In this situation (approaching a vehicle with an unconfirmed suspicion of belligerence) the proper procedure is to approach with weapons at no more than "low ready." That means pointed down at a 45-degree angle and laterally away from the suspect. These officers are instead acting like a criminal gang.
That said, merely following an ICE vehicle does not given rise to reasonable suspicion of belligerence. Following a police vehicle at a safe distance is in no way obstruction or interference. This has been well tested in court, but of course ICE and Republicans just ignore court orders these days. These officers had no reasonable suspicion to stop her, much less to approach her with weapons drawn in any way.
That too said, ordering a driver to leave the vehicle is the appropriate procedure to ensure the vehicle cannot be used as a weapon. However, in this case the driver likely feared for her life because of prior events and because of the inappropriately aggressive postures of the officers. This blunts her obligation to obey orders.
Police: We saw you throw it down. You're being arrested.
As uncomfortable as it is to witness enforcement actions, this is an example of a proper arrest. That is, the police must put you on notice that they intend to arrest you. After that, you have certain obligations in order to avoid being charged also with obstruction or resisting arrest.
In contrast, being forced off the road and engaged immediately at gunpoint is likely to make someone fearful for their life and therefore likely to respond in a way that creates danger for themselves, for officers, and for bystanders. Behavior like that from arresting officers is literally how my spouse gets resisting-arrest charges dropped. When police are trained to de-escale, this is not just for everyone's safety. It improves the chances that any resisting-arrest charges will stick. It's a perverse incentive, but it improves the chances that everyone is still alive at the end of the day.
Indeed, what could go wrong? This is an obvious operation to incite violence. These are dangerously untrained people being told they are absolutely immune from criminal charges and who can plainly see that their leaders will routinely and officially lie for them.