I think the problem is mainly the methods. Delta, for example, actively runs campaigns to deter their employees for joining the union. I don't know how is that

I think the problem is mainly the methods. Delta, for example, actively runs campaigns to deter their employees for joining the union. I don't know how is that perceived in general but I assume that people in general consider that more acceptable than the idea of running internal counterintelligence to prevent the formation of unions. The reality is that Amazon is under so much scrutiny that pretty much any program on this area would be criticized.