I do find it interesting how many people questioned whether or not to continue wearing D&G and Prada and even Gucci. But NO ONE will give up their Burberry. Listen, I get it. If McQueen (my favourite designer) did something equally idiotic (well, the brand, given that Lee is no longer with us), I wouldn't give up my Alexander McQueen items, either. But the point is that it is easy to claim people should stop wearing or stop buying some designer when it wouldn't be a sacrifice to you to do so, and it's much harder to claim the same when you're invested in the brand - either emotionally or monetarily.
And there's the rub. These designers know they can get away with virtually ANYTHING. The people who buy their brands won't stop, and when the outrage blows over, everyone will be asking which new Burberry trench they should buy. People certainly won't throw away the designer items they already have. Realistically, if we eliminated all the designers who were insensitive or even blatantly racist/misogynistic/offensive, there would be nothing left, and the discount brands wouldn't be far behind.
So, really, where's the incentive for them to stop?