Why are people so easily offended?

Certain topics really get under people's skin. Religion, politics, culture, etc. You could be telling the absolute truth and people will lie and fight for what they know deep in there mind is false. I enjoy bothering people and like to have my skin raised at times. Doesn't it show cofindence when you can admit you are wrong? I guess some people don't think that they are wrong. What happened to freedom of speech? I find that if I make one negative comment about a person they blow up and disregard any truth thereon. Of course some topics shouldn't be joked about, but there is always someone that does so. I understand that censorships is needed in some cases but have a sense of hurmor for goodness sakes. Your god doesn't exist, so what? You verify all the racial stereotypes, who cares? I am here to bring your attention to it, why are you here? Tea and crackers? Give me a good debate not a self-defense attack on me personally. Keep it real and honest right? Does anyone else agree?