Why don't people let you merge on the road?

Anonymous
I am kind of venting here... but I this is a serious question.

I hate merging on the road. When I am driving home during rush hour traffic, there was this area where I had to merge. As I was trying to merge, this guy wouldn't let me in. I had no choice but force my way in and he almost hit me, so he beeped at me. If he hit me, I would have got out of my car and punched this fucker in the face.

Why is it so hard for people to let you in when merging. Would you rather hit the other person's car and get into a fight?
Why don't people let you merge on the road?
2 Opinion