See in my view if what you are saying is being taken by so many people in a way that you (you being a general term not pointing at one person) don't intend it then you must step back and realise that you are saying it wrong.
You may not be encouraging people to attack people (verbally) in the streets but you are giving other people far too much credit for their intellegence. What if a kid over hears you calling people ragheads? They will pick that up and they will use it. Congrats you have just taught a kid to single out people because of their race.
Your reference to black people and even Jeff Foxworthy are off track. Firstly these are people from within that minority reclaiming hateful terms. Its like you being able to make fun of your brother but if the kid down the street does it you are going to beat the crap out of them. I hate hearing black kids use those words because I know how painful those words are when they come out of the wrong mouth.
The phrases 'raghead' or 'dot head' show ignorance to that persons religion and the reason they wear turbans, a headscarf or in the case of the women a hajab head covering. You know those 'dot' well they are worn by Hindus. Want to find out about WHY they wear them go to this url:
http://www.kamat.com/kalranga/women/bindi.htm
Again, no excused for being ignorant..all the answers to such mysteries are but a search engine away.
We don't have to agree with the reason they wear these things but just because they do doesn't make them part of the terrorist groups.
I grew up in Amish areas and maybe that did me good because I was surrounded by people in 'strange clothing'. I was also taught not to point and stare and make ignorant comments.
If you use a term to single out a racial group based on something superficial it is a racial if not racist term. You may not mean it that way but it is.