A) yes, I do believe that avoiding war between the United States and Russia trumps any alliance; I think if a long-term NATO ally were attacked it would be reasonable to make threats but probably not to engage in any actual conflict with Russian forces, and I think suggesting that existing Russian conflicts should be intentionally brought under NATO influence is just foolhardy. Obviously the goal would be to get Russia to back down, but the risk is far too extreme.
B) I am NOT the left. I voted for McCain 4 years ago and Romney this year. You don't have to be a raging liberal to see that you're too stupid to even do a good job mirroring what Fox News tells you.