Suppose someone says something like this:
Mexicans are great at mowing lawns!
Let’s also suppose that you, the listener, are not Mexican, however you find the statement insulting to Mexicans and therefore feel insulted on their behalf. What is a word that would describe the state of being that you are in?
Here is a good article: Second-hand Offended Is Offensive
Do you think I’m being politically incorrect to use the name “American Indian?” Well, 92% of them preferred American Indian over Native American, or any other name concocted by the “second-hand offended.”