2. We cannot invade and nation build every country at the same time. There must be priorities and nations with the resource and infrastructural capacity to nation build themselves to a considerable extent will be at the front of the line.
3. We can invade tyranical countries by engaging them in diplomatic and economic spheres. In this way, a crack is opened for our influence even if there is not immediate and dramatic change. It's a slow method, one which I personally do not prefer, but it is a means.
For the above three reasons, and others not mentioned, many (most if not for Europe) US "allies" were undemocratic regimes. Now, counting them today I figure the vast majority of our allies would be democratic.
I reject that reasoning. People very rarely, if ever, give up their freedom and vote in a tyrant knowingly. People want to have a voice in their authority - everyone does. It's animal and human nature to desire control over one's resources and decisions. Claiming that some people like being slaves and want to remain so (or that they don't know better thus they are happy) is not something for me.2) ADG isn't arguing that we SHOULDN'T establish a democracy there. He is saying that we CAN'T, because of the history and culture and politics of that region.