Don't be so quick to give in to fear. Stay calm, and think rationally. Trust me, if Russia launched any ICBMs, they would be intercepted before the reached any coast or border of the contiguous United States, and the entire world would be moving to counter.
As for Syria, it's a lose-lose situation. We should tolerate neither the atrocities committed by isis, nor the atrocities committed by the Syrian government. Civilians die in warfare, it's unavoidable. But chemical weapons are forbidden, and the civilians caught in the mix were preventable losses.
Its okay to be worried, but dont be scared. Don't let terror control your emotions, and thus your lives.. or else those that seek to cause terror, win.