Sorry, I'm a bit skeptical of this analysis. I'd like to see the actual speech. Nothing in the quoted remarks of the President indicated anything "bashing" the founders.
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I watched the full video and found absolutely nothing that any sane person could ever construe as "bashing" of the Founders or anything disrespectful to America or our troops. The article mentioned in the OP is completely unfounded and without truth.
With good reason. "American Thinker" is a gaggle of Right Wing extremists seeking expression. Go have a look at some of their other "analyses." I trust you will arrive at the same conclusion as you did for this one.
I started watching it, to see for myself, but after less than a minute I started feeling nauseous. Happens every time I hear him speak. Go figure.