I don't particularly have a problem with Sky today, apart from the BS that they did not know Valverde had crashed.
It wasn't about Valverde for them anyway it was trying to get Contador isolated in an echelon. The timing of their push probably resulted in the crash but hey, that's racing and the crash was not directly caused by a Sky rider as far as I have seen.
Their decision was to hold back or continue with the day's game plan. They went for the latter. No big deal, apart from the bad press in Spain this will have on them