Will soapy water kill africanized honey bees?

In sufficient quantities soapy water will kill any bee because it will drown. It makes no difference whether they are africanized or not.

There has been a lot of fear drummed up about africanized bees by the sensationalist media. They look no different from a European honey bee and their sting is no worse. The problem is they are far more defensive and sting more readily.