Can always take your uncle up on the offer as long as a position/internship is in the main part of Boeing rather than the "integrated military systems" division.

There is lots of work in the commerical side of Boeing rather than the military side. It's a good career. Boeing is kinda unique out of the big US defense contractors in that the commerical/civilian division is primary with the company having a smaller subsidiary that does military production. Most people at Boeing will never be involved with producing weapons and military hardware, the people who do end up in that part of the company are there because they choose to.

Honestly every established corporation in the US has military contracts, everyone thinks of the prime contractors but for every project there are thousands of downstream subcontractors. To put this in perspective, even Burger King and Subway are are military contractors.