They are there for many reasons.
a) (obviously) some are guilty of crimes
b) some resisted US invasion of their country
c) some were neighbors or relatives of people in groups a or b.
d) when bounties were being paid, it was an easy way to get rid of someone you didn't like. Just turn 'em in to US troops.
In any case, it's hard to nail down precisely what they have done when the administration refuses to accuse them of anything, and resists ant effort to put them on any sort of trial.
But you and
Senator Inhofe are correct. It is extremely unlikely that they were picked up for jaywalking.