You seem to have some details muddled there. The owners testified that they never hired anyone to protect their business. The business was already boarded up anyway, and if you actually believe a bunch of good ole boys possied up and went there to protect a single, vacated building, I don't know what to say.
Rittenhouse lied about being an EMT. In fact, he told several lies that night.
As far as his guilt, a jury has rendered its verdict but he he is far from innocent. Let's see how well he does with the civil suits.