A few things wrong there.
NB owners and their highest in management knew that there might be a backlash and that they would at least see a temporary drop in sales, and that they'd lose a few customers. They also knew that, with a change in ownership, there would probably be a restructuring in their middle management. Remember when they brought in investors and the guys on BrewingTV were let go (that is how it worked, right?)? InBev will want to make changes to the personnel structure to better match their own.
This isn't on the customer, this is on management. I don't consider them greedy or evil, but we have a right to shop at places that do business the way we approve of.
The wholesalers who supply NB/MWS will sell their stuff elsewhere. Homebrewers will keep buying, maybe other people get jobs at the places that are seeing an increase in business.