For the first time the US has the luxury to go to war without being the majority of the forces on the ground but provide with about 10-12% of the ground forces.
The Iran Nuclear deal plus Irans global ambitions and the regional unrest it has created pushed things to a point of no return. A military confrontation at this point is as certain as the white wall on your room is white.
A similar campaign against the Kurds will soon enough come against Iranian IRGC regime. Saudi Arabia, Pakistan, UAE, Egypt, Jordan, Indonesia and Malaysia will declare them as terrorist state and all the people and groups linked to it also. No U.N or International laws will be able to politically stand in the way of this intensive hunt and invasion on all individuals allied with the current IRGC led-regime and their political views and they are basically accountable for the destablization of the region and arming the houthis. They will probably declare war on them within the next 1-2 to year if not late this year. The US will mostly definitely join and take this huge opportunity to their advantage and to finally finish off a foe with the asistance of others who have issues with that same foe.
As a result Israel might attack south-Lebanon and even invade it while Yemen will also get fully invaded by the new Saudi coalition either hired Asian army or Egyptians.
Iran is away from war 1 missile launched into another region as it has been providing houthis and this will give the Saudis and their coalitions the green light on international laws to defend it's security against any terrorist entity. The Iranians will soon become Kurds 2.0 once blacklisted worldwide and then you will see an intense manhunt to follow. No International law, United nations, NATO or anyone will be able to contest this or deny it. The Saudi led-coalition will be absolutely in the right to put this to a stop just like how Turkey is hunting the Kurds everywhere they see them from Syria to Iraq. I forsee the Iranian IRGC and the Ayatul Khoemini supporters to come under 10-times larger man-hunt and blacklisted everywhere plus a very large invasion from different axis at the same time happening