I have noticed that those who seem to focus the most on the barely restrained capability and barely concealed desire to inflicting violence, often justified as being tough and 'realistic' are also seemingly the rudest, most aggressively opinionated and self-righteous group of people on the planet. They are also some of the most self-defeating people I know.

If you think the people around you are rude, impolite and inconsiderate you might take the time to find out how they perceive your attitude. You might be seeing your own attitude being thrown back at you. A smile and a kind word can often change how people see you and often will change how people treat you. Word gets out and entire communities can become much more friendly.