In my experience, the best twitter fights are between two awful, semi-famous people.

[Burney]

I saw that

The 'your dead dad would be ashamed' stuff was particularly inflammatory

I sympathise with him there. People never stop wheeling out his dead dad as a stick to beat him with, which is pretty grotesque. People do the same with Peter Hitchens with his brother and it's equally wrong - after all, as if there aren't enough perfectly valid ways to slag off Peter Hitchens without referencing his dead brother.