Now who is being rude? Maybe a new member should just be thankful someone tried to answer a question. Seems to me he was being nice (Ex) and you (Irontober) started being obnoxious. If it was not the answer you were looking for try rewording it and do not pick fights.
If you're going to ask a vague question like "Why'd they go from 5D to 1S", and are expecting a reason as to why they're now Central and not HSD... maybe a question like "Anyone know why Caledon was removed from the Highway Safety Division?".
Especially if you're going to blast people who give you the answer to the question you asked.