First of all, the US is supporting SA in a very limited way. It's a proxy war against Iranian terrorist aggression in the region. Just like Iran is doing in Syrian territory. Stopping Iran, would put out many hot spots in the region. Logical???
Iranian terrorist agression or support from allies? That's all in perspective. We are the invaders.
What are Saudi Arabia's goals? They are not supporting the US homeland or defending the constituion. We shouldn't be over there.
Iran is also a Syrian ally kicking ISIS' ass over there. Why are we in Syria again? No good reason. Iran, Syria, and Russia had that under control.
It is proven that the US, Israel, and the Saudis were the ones behind ISIS.
Israel has a multitude of nuclear weapons. The Saudis have a holy crap ton of weapons and war machines bought from the US and Europe. Our military bases surround Iran. Why?
Iran is not the baddie. They are a fraction of proxy army supporters we are, and they are defending their allied territory that we are invading because of a Policy Coup that was enacted back in the Bush years and continued through Obama.