What's more likely is: "Plumber's brand becomes associated with ISIS." "Better not patronize that brand out of an abundance of caution to avoid people thinkin

What's more likely is: "Plumber's brand becomes associated with ISIS." "Better not patronize that brand out of an abundance of caution to avoid people thinking YOU support ISIS." There's no requirement that people think that the Plumber's truck ended up being used by ISIS through anything other than an accident. But people are often very cautious and fearful and won't go out of their way to stand on principle, especially if, to them, it's something minor like which plumber they use.