That is the fundamental split - those who are willing to take the President at his word with nothing else to support it, and those who aren't. I'm in the latter camp, because of the numerous times in the past we took him at his word and were betrayed.
Again, you demand perfect adherance to your agenda.
So it doesn't matter, since you can never get everything that you want, and these Republican Senators will not so easily split the party over one justice. In the end, they will confirm her.