You get what you give, Sarah. Generally, if you can read plain text and interpret it as angry and rude, it's probably more down to you projecting your own expectations into the words than anything else. Apart from the obvious exceptions in which a person is being deliberately angry and rude, of course.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'