This seems to never end.
I send my above email about pursuing a different direction and thanking for the opportunity mid-day yesterday.
I got another late yesterday after, again from the department chair-the one who was so obnoxious along the way. He gave it to me with both barrels-said that he was tired of the "tire kickers" applying for a job that didn't actually want to work and how he's glad that he found out how useless I am before hiring me because he already has a department full of people like that he's trying to replace anyway. He accused me of lying about my interest in the job and, again, wasting his time even looking in to me as a candidate and that he hopes I have no luck find a job anywhere(never mind that I'm already employed).
As I see it, my options in order of what are probably best are to
1. Ignore this and any other emails from the entire place
2. Respond with again, something along the lines of "Thank you again for your time. My interest in the job was genuine, but several factors have changed in the time since submitting my application and this drove my decision to withdraw" then ignore any further.
3. Give the full riot act as politely as possible-"I am sorry to have frustrated you so much by this matter. Although I was initially interested in the posted job description, and remain interested of jobs of that type, my decision to withdraw my application was based on a variety of factory. Above all, I am committed to my current employer, and you have pushed me to break standing obligations to that employer in the hiring process for this job. The less than professional response I have received when I explained those obligations has caused me to give this job application much more scrutiny. Although, again, I am interested in the position the tone of correspondence up to this point has made me question the quality of the work environment I would be exposing myself to if I were to be offered this position. The tone of our interactions to date along with the events and requests made within them were the exclusive motivation for my withdrawing my application. Thank you again for your time, and I apologize for any part I had in these interactions unfolding this way. I feel that it would be in both of our best interest if there were no further correspondence between the two of us regarding this position."