You can't entirely blame them when the administration has clearly ordered the military leadership in Iraq NOT to accuse Iran. They always always add some sort of weasel words that it can't be "proved" that the Iranian government is responsible. Maybe it's rogue factions. Maybe it's loose canon terrorists. Maybe it's . . . anything but the Iranian government.
They wouldn't be saying that if the Commander in Chief hadn't ordered them to.
Interesting point.
Roger. Roger.