Bit messy, this Post Mortem business, isn't it? I'm ankle deep in blood and gore just reading the comments.
BM was an anachronism, so out of place in the 21st century that he is viewed to best effect in black and white only. He was not alone in his choice of material forty or fifty years ago when the word enlightenment, to many in his audience, meant switching from gas mantles to electric bulbs. He just didn't evolve; he got stuck in a time warp. If anything his material grew more offensive, perhaps as a reaction to the growing criticism he attracted. As a natural showman he would have known how to turn any form of publicity to his own advantage. The fact that his act lent credibility to the National Front didn't appear to cause him any concern.
Love him or hate him, however, he's gone now, so the knives can be put away.