Not a fair nor accurate analogy.
First off, Johnson had a legitimate pretext for approving bombing raids.
First, we were in the middle of a nuclear Cold War with the USSR and LBJ wanted to avoid starting WWIII with any strategic bombing activities IN NORTH VIETNAM
Second, LBJ approved a heck of lot of pretty massive and effective bombing operations.
We had hundreds of USAF aircraft in action over Vietnam at any given time . For example, there was a 240 helicopters sweep over Tay Ninh province, beginning Operation Junction City in 1967.
Third, in South Vietnam, the US military had an almost total freedom in tactical air support for American troops and routinely hammered the Viet Cong and NVA regulars with massive jet air strikes , helicopter gunship attacks and massive artillery fire.
Vietnam was a full scale war with 500K American troops.
In contrast, Obama sends one flight of 2 FA-18s to drop 4 or 5 500 lb bombs on an empty tent. The tent is empty because some al Qaeda sympathizer in the Obama admin leaked the attack so no one would be hurt.
One day of LBJ Vietnam level micromanaged warfighting would destroy ISIS for good in less than a week
“One day of LBJ Vietnam level micromanaged warfighting would destroy ISIS for good in less than a week”
I refer to the picture sequence earlier in this post of the last helicopter leaving the Embassy roof. With all of the reasons you say they are different, nothing can mitigate the ROE that were just as screwed up under LBJ and McNamara as it is today under Obama. LBJ was a totally self serving A-Hole just as everyone else with experience of that time can attest, except for LBJ and McNamara sycophants along with their willing leftist/progressives in the media that continues yet today.
Yet McNamara publicly admitted that his actions/directives were responsible for a substantial number of the 50,000 American deaths incurred in Vietnam.