I would support "his decision" either way.
I would support him if he chose to wear cap and gown. I support him for chosing to "stand down" from graduation and to "stand tall" as a Marine.
He is evidently more of a Marine than a high school graduate.
He sure as hell has my respect. He made a decision that most of todays generation might consider "weird" but the young soldier has his priorities in the right place. The Corpse only takes the best.
The school is part of that vast left wing conspiracy that tries to tell our young how to think with a left leaning slant. Kudos to this young Marine and his convictions.