Absolutely hilarious, but not even remotely proof that Cruz posted to pol. Notice, the "tweet your reply" box is contained inside the box underneath Rogen's tweet, that indicates that it is part of the image attachment to Rogen's post, not a reply box to reply to Rogen's tweet. This is because the original exchange, Cruz replying to Rogen's "Fuck you fascist" with the "charming, civil, educated response..." reply is what was screenshot and posted by Cruz (to twitter, not to pol). Someone completely anonymous then screenshot Rogen's response to that and posted it to pol. Maybe that was still Cruz, but there's no way to know.