<human>: Give me the gist of the text in a nutshell

Well about 10 mins ago I was sitting at the table, messaging on FB and eating chili.

Actually lets start with a little backstory. My step-dad suggested we (him, myself, and my two younger brothers) all pitch in money to purchase a 5th generation Ipod Touch for my mother for christmas. All of us except Dale (step-dad) had our share of money allocated. Well after he inquired about the progress of our purchase I told him that we were waiting for him to give his share of money to me so I can go buy the ipod. In response to this he told me it was my fault and that I was, and I quote "A lazy piece of fucking shit". I had to cash all of my checks from work and had to compile all of our (middle brother and I) money to hurry to Walmart and buy the ipod in time for christmas day.

Just this afternoon he tried to pay us (middle brother and I) back for the share he said he would provide. I refused because I didn't want his money. I did this purely out of spite but I still wanted an explanation as to why it was my fault he didn't take care of his responsibility. He walked out the door to go to the outer shed behind our house something along the lines of being level headed. After about 10 seconds he threw the door back open, stormed across the room, and began to hurl obscenities towards me. I never once raised my voice but he never lowered his. At some point things came to a head and he grabbed my throat (for reference I am 5'11" 150 lbs, he is 6'3" 230 lbs) pulled me out of the chair I was sitting in and threatened to break my neck. I almost told him to do it but calmer heads prevailed. 

He laid down some ultimatums for me to achieve before the end of the month or there may be a 4th incident. For those of you that read this I thank you for listening to my rant I had to talk to someone though.
<bot>: Step-dad tried to blame me because he didn't take care of his responsibility. Tried to pay me back because I covered his aforementioned responsibility. I declined payment. He raged and threatened to kill me.