Earlier quoted context omitted.
Alot of people react negatively to overt emotional manipulation. Musk's live stream is called "Making Humans a Multiplanetary Species." The only actual information in his talk was about the new line of rockets he's building. Transportation is certainly Musk's specialty, but with the information given combined with what we already know about the man's companies, he cannot even begin to address the scope of the opening…
If getting stuff to Mars becomes cheap enough, then the rest becomes pretty easy. He's proposing a system for getting stuff to Mars cheaply enough. Characterizing this as "emotional manipulation" is ridiculous. You want to see what emotional manipulation actually looks like, watch an Apple keynote. This is a guy risking his fortune on a crazy dream and presenting his efforts in a technical and factual manner.
Remember, the talk was about a method of transportation, not colonization as the title suggested. Optimism is great; don't let it be a means of deception.