In fact, they were only able to get rope anywhere near them because they were stalling. They have guns in their hands too - but they're determined to partake in this very specific, not as easy as it looks, method of execution.

Chuck gets in touch mentally, urging the boys to break free and run. Most flee when Cyke fires optic blasts, as you'd expect, though one guy takes advantage of the distance to use his rifle. Snowballs in the face neutralize him and Scott takes out his buddy with some real Captain Kirk moves.

For some reason they STILL chase these two superhumans with martial arts skills despite being repeatedly outclassed. They have an unreliable sense of self preservation, generally scared of their abilities but wanting to kill them for having them. Fortunately Chuck solves bigotry again, though nobody learned anything. I assume he wiped the sheriff's memories too - so they receive no consequences for trying to kill two children.