Do see a fair bit more Cruze models here, too. But I would not necessarily say it is just because people "like" them. There were lots of Cobalts here, too, and hoards of craptastic J-bodies before them. I think the reason so many sold were because they were cheap and the brand loyalists were going to buy them regardless.... they did not cross shop anything else.
If GM could not count on brand loyalists, I'd imagine current Cruze sales would be much, much lower. Prospects of selling diesel versions would be even more bleak.
GM's marketing as of late does seem to be heavy on the patriotic side, which is nothing new. I for one am not ready to part with my hard earned money just to "buy American", and it is not just because I really know the true source of much of the content of these so-called American models.
But in the end, more cars here available with a diesel engine is a good thing, in my opinion. And if they wear a bowtie, so be it. I'll still be driving a Volkswagen. Chevy runs deep... but my 'dubs run deeper.