Suffice it to say the U.S. has sold arms to at least 4 nations that it is flying surveillance on, as we speak, planning for future attack.
Can you name one nation Russia has sold arms to and is planning to attack?
Checkmate. You make it too easy, lad.
You have failed to answer the primary question... that of "when?". I submit that Russia continues to either provide, sell, codevelop or service the arms in a number of nations of the Trans-Asian Axis, whereas the US no longer do. I do not dispute that, at one point, during a past and glorious period of containment and roll back, the US were quite successful in setting up "the northern tier" including Syria, Iraq, Iran, Afghanistan and Pakistan. Gary Powers took off on his last flight from Afghanistan. Unfortunately, during the pacifist, naive liberal era from the early Kennedy adminsitration clear through to Reagan's first day in office, the US were losing ground, and each of the above nations fell into the orbits of either the USSR or the PRC (or both). During the Reagan years, the US (the CIA in particular) supplied Stingers and aid to seemingly "anti-Soviet" Islamist forces, but, due to our reliance on pro-PRC (and these days, increasingly neutral-to-pro Moscow) Pakistan, were duped into believing that the Paks were really on our side. Now we know...Musharraf's lies notwithstanding.
Long story short... the nations that we ought to blow away along the southern tier of the Trans-Asian Axis (.... then what, I might ask, constitutes the northern tier of said Axis?...) are now in either the Russian / neo-Soviet orbit, or the PRC one, or both, and, are, to their misfortune, only past but no longer current American allies. Too bad we could not hold on to them, too bad they will pay the price, and, most importantly, too bad Russia and / or the PRC are in bed with them. You are either with us, or ....