Well, first of all...let's think of logical possibilities and/or reason that a large supermarket chain would do this...
too many customers inquiring and looking for the specific item, in this case Religious Candles...so instead of inconviencing the customers they made a shortcut, this way even the non-spanish speaking families or elders can easily get everything together.
and about the pinatas...its more universal than the candles. I will and never have seen Religious Candles in any other race's homes. But I had pinatas for my kids, as well as see other races have pinatas at birthday parties.
I worked at Foodmaxx for 4 years in the past and a lot of supervisors and managers are Mexican...and they do have a little bit of control over what goes where. Im sure whoever's idea it was to put the candles there didn't say, "We'll make fun of them for sure now."