The Obama Administration has initiated a bomb and land-based missile attack against Syrian territory without permission from the Syrian government, without a request for assistance from the Syrian government, and without a UN Security Council resolution.
This is an act of US aggression against a foreign nation and a violation of international law.
The attacks were also made with no declaration of war or authorization from the US Congress. This is an illegal act according to US law, a violation of the US Constitution.
The 2001 Authorization for the Use of Force against perpetrators of 9/11 attacks could not be legally valid for Obama's attacks on ISIS in Syria because ISIS is not part of al-Qaeda and in fact did not exist at the time of the 2001 attacks.
Ostensibly, today's attacks on Syria are part of the US president's plan to "degrade and destroy" the Islamic State in Iraq and Syria (ISIS), however the "international coalition" participating in today's airstrikes in Syria -- Bahrain, Saudi Arabia, the United Arab Emirates and Jordan -- have all to varying degrees supported ISIS and other radical groups seeking to overthrow Syrian president Bashir al-Assad. Additionally most are despotic states every bit as authoritarian and theocratic as ISIS itself.
Even France, which enthusiastically participated in the 2011 bombing attacks on Libya, has refused to participate in the US air war against Syria.
There is no legal justification for the US government to attack Syria. A request for US bombs on its own country by US-backed opposition seeking to overthrow the Syria government is not legally sufficient to legalize US actions on Syrian territory.
On the pretext of destroying ISIS, the US is cooperating with the Gulf states which have backed ISIS, and is acting against the Syrian government which has fought ISIS for three years. US mainstream scare media will not touch this critical point, but it exposes the lie of US government propaganda.
This is an illegal war. Next step boots on the ground.