Why is USA so afraid of Russia??

There has to be a reason.

Can't be militarily as the competing forces are clearly in USA favour. Even Russia would admit to that.

So if its not military attack USA is defending why are they worried about the Russia threat if there is any??

Is USA attacking Russia for the sake of it or because it wants to?

Why does USA not attack China?? Is it to do with trade like Trump said other wars was about oil?

Or is it the elite in USA pulling the strings afraid of other consequences??