I'm not sure that hatred is actually required; if none exists, fans will just invent it anyway.
The one-on-one rivalries of the past were, to a large extent, a product of the lack of overall competitiveness of the field. This season, the competitive order was subject to great fluctuation, throwing more than half of the field into battling for the top five positions at various points throughout the year. It was never the case (well, until Interlagos) that Vettel only had Alonso to worry about, nor vice versa, and from my perspective, long may it continue. This way, we get some interesting insights into how drivers deal with their various rivals, such as how Vettel felt comfortable bullying Button at Abu Dhabi, yet gave Webber a wide berth at the start in Brazil.