America crossed ‘red line’ with agent orange

Barack Obama has stated that the Syrians have crossed the red line in using chemical weapons.

Where was the red line when the Americans were using agent orange and napalm in Vietnam?

They also used depleted uranium in 2000. Whistleblower Bradley Manning was disgusted by so many civilians getting killed in Sudan, Iraq, Afghanistan, Pakistan, Libya, and by the unfeeling attitude of the West. There was no red line when Israel used white phosphorous in Gaza, during the Iran-Iraq war. It’s alleged the CIA supplied Saddam Hussein with chemical weapons.