This is a very weird and confusing discussion you’re having.
The only drivers that would yield to give either Alonso or Vettel a better shot at the championship are their teammates: Massa yields for Alonso (no doubt about that, as they have been disgracefully doing this all year long: Italy, Korea and USA for example), Webber, and possibly Vergne and Ricciardo yield for Vettel.
Apart from these cases, there simply is no chance that a driver would let either Alonso or Vettel pass. All 24 drivers are professionals, and it is their job to separate driving an F1 car from any off-track issues. If for instance Hamilton would yield for Alonso, then this leads to a lot of negative publicity: for Hamilton, for Alonso, and for Formula 1. Hamilton has not been that much of a professional McLaren driver this year, but messing with the championship by yielding for Alonso is in a different league. In my opinion, not one of the non-Red Bull and -Ferrari drivers would even consider doing so.