It's unbelievable because its not true.
He did not indicate he'll support most of Obamacare. He named two "reforms" that his plan has in common with Obamacare. There are literally hundreds of aspects of Obamacare, so agreeing with two of them is not that bad.
He's on the record as opposing the individual mandate and supporting tort reform, both of which make the two aspects he agrees with quite minor.
That's an awful lot of Koolaid. The problem is that the two reforms he supports happen to be major cost drivers. If he just supports them -- and no mandate -- then insurance companies will either jack rates through the roof or go out of business. If you think pure Community Rating works in a free market, I have a bridge to sell you.