Why are some people so inconsiderate

Whichever situation you are dealing with, it is pretty clear that the inconsiderate behavior is not directed at you personally. If it is someone who is rude by nature, they are probably like this with most folks they encounter. If it is a person who is simply having a bad day, he may feel remorse regarding his actions later on. Either way, you may be on the receiving end of the inconsiderate behavior but you are most definitely not the cause.