If I were the writer of this article I would rewrite as follow.
"So why, with all this, am I certain that Microsoft can't be trusted?"
If I want to say "So why, with all this, are many open-source fans and developers certain that Microsoft can't be trusted?", then I would want source to back me up. This is how I want to earn "Trust" :)
I am always saying windows is better OS for desktop users than linux, and I would never trust MS. Why would open source people trust MS is beyond imagination.
MS doesn't stand a chance when it comes to me (and I imagine others) trusting them. Too much BS for too many years.