Some people are against this due to being displeased with Obama. I am against this as I don't see the point of acting unilaterally. It is to me a politcally bad move to do so. First get multinational support, then move on with a course of action.
How do you define multinational - more than two countries? And how do you define support - warm words, or something a little more tangible?
If Russian and Iranian interests and ours are in conflict, particularly in a given area, for damned sure our government needs to consider that ... so the "hawks" are at least thinking at the appropriate level.
In some respects it may actually be a good thing that the Administration has broken cover regarding their real intentions and concerns. It will focus minds on both sides of the divide, in the event anyone was in doubt as to why we're doing this.