Tragic blunder. What did he think was the end game??That policy could succeed--only by threatening Hanoi. But LBJ was never going to do that, so it was a meatgrinder strategy in which the enemy had time to find a winning (political) strategy.
PERSECUTION OF MONTAGNARD CHRISTIANS IN VIETNAM
Christmas crackdown in Vietnam (Communists persecute Christians, again)
3 executions in Vietnam alleged as part of government crackdown (on Christians)
VIETNAM UNREST THREATENS TO RAISE OBJECTIONS (persecution of Christians)
There wasn't an end game. This war did not have , at the beginning, a "Noble Purpose". LBJ was only interested in preventing Saigon from falling to the communists before he could win the '68 election, and a second term. That's it! There is no other geopolitical strategy to apply to the start of this war.
Lyndon didn't care about Vietnam, he didn't care about US servicemen. H*ll, he thought they "belonged" to him. Lyndon was a "Kingfish", in the Southern political sense. He owned the sheriff, the courthouse and the jails. You don't think, as President, LBJ didn't think he owned the Army too?
Vietnam is not complex at the beginning. It is about political power in the USA, and not a World struggle.