I agree with you, Islam is an Empire. The fact that they change names and all have members from different states show that clearly.
The main reason they are attacking America less is they are afraid of us, and with good reason. The attack by Oslama caused the destruction of two Islamic States. Very stupid move by that boy and by the teachings of Islam he is a shame to Islam.
However, they will save their best for America. It is a pride thing. They get a Nuke and you can bet it will go off in the US, not Israel.
Israel will fire nukes back. The United States most likely will not as we do not have a target. Israel has plenty of targets. Nuking the US is much safer for Muslims, and they know it.
I don't think they see the US as a safer target; rather I think it the other way around. One attack on the US cost them control of two terror-sponsoring Muslim nations. Decades of attacks on Israel cost them nothing, which is why they keep doing it.