How to get along well with the boss in the US?

How to get along well with the boss?

I got very upset this afternoon, and it is not the first time. I was busy with my work in the lab when my boss, actually my advisor, came in. He started to talk with one of my colleagues, Sam, loudly about his presentation practice yesterday. I couldn't focus on my work, so I left our lab and went to another shared lab.

After a while, my phone rang and another lab-mate, Jake, asked me to go back and give advice to my boss, because my boss asked everyone to be there and to help them make the presentation perfect. Then I went back and sat there, listened carefully, and expressed my ideas. I pointed out that one of the plots in Sam's slides may not be quite reasonable, because the power breakdown for the entire system is dramatically different from my previous experimental results and Jake's. I also pointed out that the results similar to mine could also be found in literature, or even derived from common sense. However, my boss just didn't buy it and became very mad. He said that I could be wrong, I wasn't enough of an expert to comment on this, and it was none of my business, unless I had a solid evidence.

I felt upset from this moment, and Jake didn't say a word, though he agreed with me, so I just googled this topic and found several references to justify my opinion. Showing these to my boss, however, he became even angrier. He said I was stubborn, that I should take a step back, and had to change. I just don't understand! The anger seemed to come out of nowhere! What should I do in this scenario? We are doing research in computer engineering at a university. Am I right to point it out? Did I corner him? Any ideas to get along well with the boss in the US?

(I hope someone can help me make these sentences as natural as a native speaker's. Thanks a lot!)

[Your English is excellent.  As far as your problem with your boss goes, it has nothing whatsoever to do with the fact that he is from the U.S.  Some people are very defensive when they are seen to be in error.  Sometimes it takes extreme diplomacy to tell a person they are wrong without having them I don't know what to tell you in this case, because I don't know your boss.]