My point is that Sarek is compulsively inflexible when we first meet him, but he's not a bigot.
But who ever tried to argue that Sarek was a bigot? We only said, like Spock, and like the reboot Spock
, Sarek aims high, but falls slightly short of Vulcan ideals. Vulcans are ultimately more human than they realize, especially in Spock's family.
Therefore, I personally see no reason why any of the supposedly "human" characteristics in reboot Spock should come as a surprise. These were already present in Spock and in other Vulcans like Sarek, and having lost his entire planet and his mother, there is no reason that reboot Spock shouldn't be a little mindful of his emotions. And, as Into Darkness has shown, he reigned that back quickly after the Nero incident (although, sadly, suppressing emotions through self-sacrificing, self-destructive behaviour).