I did not believe for a second you directed the finger at me, the thought never entered  my mind.  
   
  In reality I am more astute than some believe, though I have been fooled before, but never conned by an offer that looked too good to be true.

 I have to admit, I thought only  Elmer Fudd type Jews would find offense with the don't "Jew me down " phrase.  
  I have no doubt you are not that type of guy.  
  To be fair and balanced with hopes a defensive reader won't find offense, I've seen many Caucasian fuddy duddy,  Elmer Fudd, type guys, actually many more than Elmer Jews.
   
  I'm not sure how the term "Jew me down" originated, likely from old books portraying Jews as the primary money lenders with high interest rates  and Jewish merchants in early trading days bargaining to buy trinkets at reduced prices to sell at inflated retail.  
 
    I know that's not true in todays World as a trait reserved for Jews only.
 Over  99% of car dealerships are not owned by Jews.
   
 I'm not sure if it was true of only Jews way back in the early days, or when the cliché first started.

 
 Some people believe Jews control the banks today, that's far from the truth IMO.  
 
I've heard from friends who travel to Mexico, if you don't negotiate there, you will pay  
  three times the price.  "Don't Mex me down"  doesn't have a ring to it.  
 
  A Gal friend of mine who lives in Thailand said anytime I  want to buy anything there, she can get me a much better deal since she's a Native and knows how to bargain with them.
   "Don't Thai me down" has an air of familiarity.  

   Every Guatemalan I've met has mentioned words to the effect, Mexico s nothing but Mexican bandits.  
   
  A guy I know buys rugs from lands surrounding Israel and brings them back to the States, he said if he doesn't negotiate like a mad man while acting  irritated,  he won't get the price down low enough to be able to make a profit.  
  I'm back to thinking about car dealers.  

  Many phrases some never give a second thought about, while others find offense.  
   I've heard a few  I would never repeat.  

I can't help but notice, the  less racism I see, the more the politically correct, word  police, beat their drums.
   
 In my youth a  term used often, "Don't Welch on our agreement/bet/promise.  
That's  now deemed offensive .  WTF!   I had no idea in my youth Welch was a country or a term for people who live in Welch.  LOL    
 Did we mispronounce or did someone twist our word into something else,  like many in the media do with Trump ?

The term "Low man on the Totem pole" is a phrase that's been used   for many generations.  
  I imagine you've heard that phrase before, most people use the term to designate the bottom choice or least valuable of the group.    
  The reality, The low man on the Totem pole is the most valuable from  Native Americans perspective.  
  Most  Totem poles made by Native Americans have the lowest man on the pole at eye level.  
    The level of respect.

   Some Native Americans and many lily white pansies with too much time on their hands, feel  
  the word Redskin is  a derogatory  term.  
  That was never the intent when Washington named their team.
  Don't get me wrong, I'm not a Washington fan.  

   I wonder if there are many Navy guys  who find "drunker than a sailor" offensive.
   All of the  drunk sailors I've met,  wouldn't  have a leg to stand on disputing that statement.  

     I almost forgot  the one I find most absurd and laughable.   "Indian giver".  
  Was George Washington an Indian?  
           
In my area we keep an eye out for traveling Gypsies to avoid getting gypped or ripped off.  
     I'm  calling  that one exactly as I've seen it happen to my neighbors, even though  Gypsies  have  never bothered me or attempted to sell  me a sub par asphalt driveway.  
 
    Perhaps the Goat heads on spikes at the end of my drive gives  thieves a reason to pause and  think twice.  

I've heard may different  phrases over the years that are not accurate depictions and many people find offensive.

   I'm not concerned when someone calls me something I know I'm not.
   
  After reading your reply, I'll be sure to never put "Don't even try to Jew me down" on an ad for something I am selling.  

   Unfortunately for  you and anyone else  finding offense , I don't expect the term to go away anytime soon.
   Some youth of today have  morphed "Jew me down"  into something I find very morbid and disrespectful, and you will likely find it much more disgusting than a few words  referring to bargaining, when you hear it.
  The first time I heard it I said WTF!  After it was explained to me I wish I hadn't asked.  
     Hopefully for yourself and them, you won't hear it in your presence.