Camp Cody interview questions

I filled out the application. Got call back for an interview. After the interview, they contacted me after a week telling me he was interested, but he wanted to make sure everything is legal before moving forward. Lots of emails from him asking about my work authorization, which I gladly explained, and made sure I'm authorized to work in the US for any employer (even asked me to take picture of my EAD card). With the progress of 1 email/day, he finally got back to me 3 weeks later with a rejection email with no further explanation. I would have understood if there had been an explanation to why I was rejected, after leading me on for 3 weeks. The only conclusion I came to mind was they are pretty xenophobic.