Is refusing to sell a gentile kosher wine, kosher?

I heard off-Passover season wine has corn syrup. 

Wearing my Christmas cap, I went to my usual liquor store. The store is handy – a couple blocks away.

Tonight is the first night of Hanukkah – I celebrate the Jewish holidays and asked if he had kosher wine for the community candle lighting.

He said not and I went to the next store down and there was an ample selection.

The question is, if my neighborhood guy does carry Manischewitz but didn’t sell it to me because I wasn’t Jewish is that a violation of my civil rights?