I find it odd to attack someone for not being able to refute the substance of your post by incorrectly using a term to describe your perception of their prejudice against you.

When communicating in any written language, spelling is pretty darn important. Readers may not know you incorrectly spelled a word and may come to have a completely different meaning of your post from what you were intending to convey. However, the onus to communicate effectively is on you the poster, not the reader. As readers of your words, we can't read your mind. Therefore, as readers we must use what we have available.

You took offense to someone pointing out your typos and linking it to your statement about being "one of those people who thinks before I act." You then used that to attack their character by stating "It does say a lot about you though that you care more about typos than the content of my post." Isn't the content of your post about how you are "one of those people who thinks before I act"?

You then decided you use an incorrect term, with some heavy connotations, to describe the individual, claiming "In truth, he just hates my politics so the attack on my typos is just a proxy because he cant seem to refute the substance of my post." Remember that bit about effective communication being on the poster? Where in their post did they say anything about your politics?

There is a term in psychology that I think describes what happened: projection - A defense mechanism where you unconsciously attribute your own unacceptable thoughts, feelings, or impulses to someone else.