Well, did Sanders vote for the resolution that condemned the Goldstone Report that revealed Netanyahu's atrocities in Gaza? I believe he did. Furthermore, why does he not condemn the Israeli nuclear stockpile as a threat to Middle East peace, or the tendency of both Turkey and Saudi Arabia to support the terrorism against the Assad government? Is it because Bernie has supported regime change in Iraq, Libya, and Syria? And, he has supported the US supported regime change in Kiev and the US sanctions against Russia.
As to the Russians, they have the legal right to be in Syria because they were invited by Assad to defend it. Same with Iran. We, on the other hand, support AQ elements to overthrow him, namely al-Nusra and Ahrar al-Sham. Is Syria guilty of the crime of self-defense? Worse is Clinton, who would enforce a no-fly zone against Russia in Syria, which is nothing but nuclear brinkmanship over a regime whose destruction is her pet project, not a US national security issue.
But Bernie is dragging on her skirt-tails here as well, never condemning the coup d'etat in Kiev, or having the courage to tell voters that Crimea became part of Russia because it didn't want to be part of the coup government it didn't elect.