why are people so often their own "worst enemies"?
436149
People make mistakes and they cannot forgive themselves. They try to blameselfs more to please other people. They end up hating themselves. They think everything is their own fault.
16903
Its because they know almost nothing about a group of people, people who don't understand people either try to understand people or choose the easier rout and simply hate them.  Mostly they don't want to understand these people because even before they know anything about these people, they feel threatened or scared.  Whether it be because the threat of lost jobs, terrorism, or something else.  Hate is just the easier path despite it not being the better one, and as for War its the larger scale of that hate.
495214
People learn what they live.  If they were raised in a loving environment, chances are they will be loving.  If they have been kicked around, told they were worthless, never given a kind or positive word, chances are they feel like they are worthless, and continue to hear the ringing in their heads that they will never amount to anything.  So they tend to be the angry sort.  They are afraid to get close to anyone for fear that they are not good enough, or that the person they get close to will not stick around.  Why should they expect them to, No one else did.
540938
People hate each other because they are not pleased with themselves which causes them to become jealous of others. Most people are jealous because they see others with the things they feel should be thiers instead of focusing on themselves and trying to get things on their own.
386274
People tend to be controlling out of fear. Family members can be controlling because they are afraid you won't make what they consider to be the "right" choices. They try to keep things in their realm of understanding and reasoning. \n\nIf they are really being mean then they may be controlling because they are afraid of being inferior in some way. If they keep you under their control then it makes them feel like the superior person.
24271
because they're afraid of judgement.  they judge others because they feel judged themselves.  i hate people that don't like me, but i don't try to, it just occurs that way.  we can supress or express our hate, but it's still there.  people hate as often as they love.  the end... i suppose.
981972
I don't know why, but it seems that there are many people who simply enjoy hurting others.  I suspect it stems from them feeling powerless and insecure, so they get a small charge to their own egos when they can make someone else feel bad. \n\n There are, also, others who simply take advantage of people - they see goodness and kindness as a kind of weakness they can exploit for their own means.\n\nDon't let this turn YOU bitter, though.  Remember to tell yourself that those people, in the end, will suffer for it when they find they lack solid, real and loving friendships in their lives.
306786
Because other people were mean to them and they are bitter, or take a sick pleasure in spreading their hurt feelings around to other people.\nDon't let the mean people get you down...there are lots of nice people (like me!) around to make up for them.
682947
Because they know more bad things about themselves than they can see in anyone else around them.
538452
I do believe it is because we are living in a totally different world these days.  People are stressed, and sometimes they are crabby and just don't relize that they are the ones with the bad attitude.\nI also believe the devil and his demons are playing with us.  They can't make us stop believing in God, praying to God, talking with God or anything along that line, but the devil can interrupt our lives with TV, impatience, hatred, and etc...I think you get the picture.  So everytime I see someone who is being hateful, I smile and tell them to have a better day and go on.  Cut the devil out and you will see a change in people.\nJust don't become one yourself, a hater that is.
582000
Because they think they're better than others, or either they're insecure about themselves and try to find fault in others just for the heck of it. It happens a lot nowadays, you just have to learn to be more open-minded. If people dont like you for who you are, that's their problem.
638134
Its' just that not everyone realizes it. Even if you want peace, the other person may not have the intelligence/ understanding... and when someone bad is out to destroy you... for the sake of mankind and good one has to fight.
345302
People disagree because they have their own personalities.
473221
Don't you think that we all have people that hates us? Just think of it like this, look at everything you have to offer someone and they choose to not like you, it's their LOSS!
919877
people are rude because they are miserable with they're own life and feel the need to inflict themselves on normally happy individuals in an effort to make them as miserable as they are.
255088
I think really it's only human to want the things we can't have. The ones who love us the most only want the best for us which means putting up with the bad things as in not being able to go out, a crappy curfew, etc. So we end up hating them for a while but in the end they only wanted the best for you. The ones who hate us, they let you do whatever you want to you tend to like that freedom.
798204
Right now, it's jealousy.  Yes, some people do actually hate other people because they differ on opionions.