While that's true and no matter what you buy it likely has foreign parts in it, Deere does full assemblies here. If you look at the assembly line for even lawn equipment the chasis welding and decks get stamped here. The combines and large tractors are completely made here also. My 3320 was assembled in the USA (Georgia) and it says so right on it.
I'll buy a Honda, Subaru or Toyota here because they are built right here with plants right here employing American workers. I figure the best you can do is buy what employs the most Americans but I won't buy a piece of junk that's made here but personally I don't see a lot of that. I think the American worker is as good as any worker and takes as much pride in his or her product as anyone else.
Lots of machines are built somewhere else and optioned out here, I wouldn't say this is the case with Deere.
I think if you buy a Kubota, you'll get a good tractor, I'm not sure the parts availability is up to Deere though. Hard to beat Deere on parts, Agilent comes pretty close though but that's test instruments.
Rob