It is the same Conservative Party and, like all parties in power, it's behaving no differently. The leader's survival is intertwined with many of his members' survival at the polls, which is why so many were prepared to back him publicly yesterday. He is also backed by a wedge of members who have pledged undying loyalty for delivering their raison détre (irony deliberate), and they're more terrified of relinquishing that than anything. Only one spoke out in the House yesterday, but more voices will be heard in the coming weeks, and by the time the energy bills start appearing in October, that will be a cacophony.
Still only conceivable rather than likely, but if the Conservatives contrive to throw away a seventy-strong majority over the course of a parliament, it will be some feat.