Aside from the fact that they got close enough to threaten them at gunpoint, you don't want to escalate when their attention is on you or else you risk getting shot and killed.
You want them to turn around so you have the opportunity to draw your own weapon.
Questions should be asked why a Secret Service agent was not wary enough about his surroundings in the first place. That's literally their job.
That's not an uncommon thing though.
Aside from the fact that they got close enough to threaten them at gunpoint, you don't want to escalate when their attention is on you or else you risk getting shot and killed.
You want them to turn around so you have the opportunity to draw your own weapon.
Questions should be asked why a Secret Service agent was not wary enough about his surroundings in the first place. That's literally their job.