I disagree. Cruz is treating thinking conservatives like debating opponents, where he lays out his position and the reasons behind it. If thinking conservatives disagree, they can (and do) lay out their positions and rationale in an opposing statement.
While it may be correct to oppose TPA as a conservative position (I have not digested the TPA text, so I will not try to stand on one side or the other at the moment), saying that Cruz is being Obamaesque for laying out his reasoning like this is a mistake, in my opinion. He, at least, is trying to convince skeptics based on his understanding of the actual bill, as opposed to grandstanding and pontificating based on what people may wish to hear.
It may become true that Cruz's support for TPA is a millstone around his candidacy's neck, but his treatment of those that disagree with him is, again in my opinion, entirely honorable and forthright. He is not engaging in name calling, nor trying to shame opponents - he is explaining his position based on the facts as he understands them. I wish more politicians would act this way, personally.