Hey, I'm just the messenger. I did my part and now I'm out of it.
Regardless of who asked you to do that, it puts Jens in really a bad position as most of us automatically associate your post with Jens, if he requested you to do it or not. I'm not really sure how Jens can rectify the situation, he is going to lose sales if he embraces his competition but that would signal it wasn't him making the request to you. If he does nothing, he is going to be losing face and sales even if it wasn't him.