@layman,
Viet nam vets expressed the same frustation. LBJ notoriously said "I don't want a single god-damn outhouse bombed in Viet Nam without my prior approval."
The rules of engagement were such that they often couldn't even protect themselves. To a man, these vets swear that we could have, and would have, stomped the NLF and the VC if the politicians had just let them do their job.
Same with the Border Patrol and ICE, and the striking current results reflect the tremendous difference between effective policies of law enforcement and the refusal to enforce immigration laws in favor of letting aliens just walk in and demand refugee status.