Remember the phrase from Revelation 13:17?
And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name.
In the German states Hessen and Niedersachsen, stores are now able to deny access to non-vaccinated customers.
Many discounters, like Kaufland, Aldi or Lidl are against implementing the so called 2-G Rule, because the procedure of controlling vaccination passports would cause long ques in front of each shop.
Furthermore, the removal of this opportunity to buy basic things such as food would cause for a high pressure on vaccine-free people. Especially on the countryside, many wouldn't be able to shop at all, possibly making for many lawsuits which could even be won by the customers.