The point is, he has open source and free alternatives to Safari, that are equally good or arguably better. If he really cares about openness, I wonder why it hasn't influenced his decision.
The point of this article isn't about open source-- it's about open standards. In fact, it doesn't mention open source or free software at all. He actually says "The bigger problem is that they’ve abandoned interoperability." Chrome, Safari, Firefox, even IE are all interoperable; by working together on open standards, users have a nice selection of choices, regardless of opinions on FOSS/Closed-source.
I don't really see it as that terribly inconsistent to care more about open protocols and open content than about open source software for your personal use.
Maybe not. But it's hypocritical of him to not criticize Apple for pushing for an app-oriented mobile experience and using patents to block the progress of HTML5 APIs.
