You cannot seriously or accurately say that we can ignore what's going on in Iraq because Iran and ISIS are the real ballgame. Fact is, Iran and ISIS are behind what's going on in Iraq.
ISIS needs to be destroyed, period. Only by destroying ISIS and wiping their existence off the map can we then have Iran take us seriously in regards to their funding terrorism around the world and their attempts to build nuclear weapons with which to threaten their neighbors in the middle east and Europe.
Iran, ISIS and Iraq are not separate issues. They are intricately linked together. If we ignore what's going on in Iraq and what ISIS is doing there (and elsewhere...) we do so at our own peril and it'll be only a matter of time before we have another 9-11.
Iran is a problem...Let Israel take care of them and or the Gulf Arabs is a solution unless someone or some special interests want the United States to do their fighting for them.