Why Do People Get Upset By Words, Thoughts, And Opinions Of Others?

People are fickle! They don't know how to react to things sometimes, and others they will react, and sometimes overdo it. Usually because they have a belief and adhere to it strongly. Like if you call someone a name, then the friend that is with this person might object to you saying this, they will react with a negative reaction because they think that this is wrong to do to someone.
Or in an opinion, names may be called because of the belief of another person, just like with the name calling for no reason. People have feelings, and beliefs, and if the feelings are strong enough, they will defend that thought or feeling vehemently.
It is in our programming to be defensive if confronted like this. I don't know any other way to say this, other than how I just did. I hope I helped at least a little bit.

I wouldn't know how to answer you on a "biological level", because for the fact
that 'We' as part of the Human Race, are not JUST a biological, physical Being....
We are----Body, Mind, and Spirit...And all these things are to be taken into consideration...When we get sick, and we go to the doctor-----all they ever look at is the physical...Sometimes we get sick and they can't figure out 'why'?
They don't realize that at times it's the 'Spirit' that is 'aching'.....Really! Sounds nuts? Well, have you heard about "Stress" making  you ill?.....I went through 23 1/2 years of pure 'hell' with my now 'ex' husband-----my health was really bad....
I was a mess, anemic----you name it-----plus, I had pretty much given-up on life
(then I found my now--Soul Mate!)...Wouldn't you say that this has relation to the "Soul"? Doctors and Scientists can only deal with something that they can---'touch', 'see', 'smell', 'hear', 'feel'...They cannot understand the Sixeth
Sense, which comes from our Spirit...
I hope I helped...love, cyndi

As the bible says,you are suppose to shake the dust from your feet after telling/giving someone the message/ answer/ response when they don't want to hear the response and take it to heart...then you move on to the next city/person/topic....so to speak..people want to either prove to themselves they are in the right or not admit they are in the wrong/don't know everthing...: )....some are unable to see that  maybe they are not the one to reach the other person and can only upset the train so to speak,push the person away from accepting the truth/knowledge trying to be passed on from one person to another...and sometimes it is just that  the person picks up on whether or not the other is who they portray themselves to be.....