While I agree that this was "a totally egregious act", the king unfortunately wields ownership rights allowing him to lock the doors. The priest/bishop has no claim on unfettered access to the property. The diocese needs to provide their own property if they want to off mass with unrestricted access.
You’re right of course, legally, technically, Obummer has the “right” to do this, and the military chaplains can’t complain. I’m still grateful however that they are shouting about this loudly enough to be heard.
Because while this isn’t an infringement yet on our First Amendment rights, it’s inching closer. And each such incremental motion must be noticed and resisted.