Just wait the little guy out. As long as you have a good, secure setup with the right temperatures, he should calm down over time. When I got my first BP, he came out of the shipping box looking for blood, and was like that for a couple of weeks. I didn't really mess with him during that time, and then one day when I went in to clean his cage and I noticed he wasn't defensive at all. Since that day, he has been a joy to handle and work with. Just give him a bit of time to settle down and he most likely will.
Hope this helps!