Ockham's Razor. I think. I don't really know much about this though
The U.S supported israel while Soviets supported syria and egypt
The US's the fear of Radicals and the Bolshevik revolution in Russia. US Police roundedup suspected foreign born radicals and had them expelled from the United States. Fed growing demands to limit immigration.
Generally speaking, the chief executive is a member of the legislative branch in a "unitary form of government", since in this government there is only a single governing body.