Have you considered that so much of what SA talked about on his programme was just rubbish - let's face it, at 4 am who wants deep meaningful analysis 
- it was quantity not quality, stream of consciously a la "no Hesitation, Repetition or Deviation" (he failed on all counts but anyway). It was highly likely to be rubbish, waffle and space-filling
He was never consistent or coherent in his views (except when it came to showbiz, he does have an encyclopaedic knowledge of that), he sometimes contradicted himself even in the same sentence! That was because of his 'one-in-a-million" broadcasting style that Global allowed him to get away with for a very long time. They turned a blind eye to a lot of what he said because he attracted the audience figures, getting people to tune their radio to LBC and stay there.
The tipping point based on what I've read was
The furore over his mean and tone deaf comments fired at Tilly Ramsay
His refusal to acknowledge Sam Smiths preferred pronouns, and when he was told to retract his mis stating of them, he probably thought bollocks I can't be bothered to toe the line anymore You can teach an old, misogynistic, bigoted dinosaur new tricks,
I never paid the slightest attention to the accuracy of what he said, it was just a load of old waffle. A very Marmite presenter.