I agree with the (general) sentiment ,which people and which religion (in modern times, not historically) is an issue. I'd strongly suggest Letter to a Chrstian Nation by Sam Harris that makes the same argument, but in detail and it's a quick, smart come out of it armed with more specific info type book. Top 10 book suggestion (my suggestions) besides. =D
(would suggest this book to everyone of high school reading level in the country , world would be a better place)
But the point of the topic is , to be more detailed, civility toward people , they are human beings, they were (mostly) taught a certain way of thinking, they made no "choice" , nor in most cases especially in the west are they being "mean". Being mean / rude will not help change this "great evil". Some of it will never change due to human nature. But some of it can change, and a lot faster with honey than vinegar. Vinegar will change no ones mind. Also it just has no ethical basis for it (being rude) at least not on mine, and I'd say probably the "best" moral compasses.
I can understand the outrage at some things, and the difficulty in not being rude / abrupt. Hell i know people in real life that I think are nice people, but I have a HELL of a time not just ripping into them when they say something that just seems ... totally outside of reality. But is it more important to evetually have a civil conversation and try to change things, or is it better to just be an angry ass? The angry ass might "feel" cooler, but in reality , being nice wins the race. Can still be firm/steadfast and be at least (fairly) polite.