"I am critical of the standard of roadcraft, by pedestrians, cyclists and motorists, consider that all are poor. On this site there is IMO a particular blinkered attitude to our own failings"
I could point you to the rubbish cycling thread, or note the innumerable number of posters - including myself - that freely confess to incidents of poor cycling, but I suspect it won't do anything to change your view. That's fair enough, you have your opinion, I have mine.
But I have to ask: does it surprise you? If you went to a car-based forum and said 'you all drive poorly, but so do bikes and pedestrians, so no hard feelings?' would you expect a warm reception? Would you be surprised to find a thread on say a runners forum discussing the problems they have with bikes?
If I wanted to see people raging about 'bloody cyclists road tax red lights...' I can find a forum for that. But I don't, so instead I'm on this bike-orientated forum that as noted has a pretty high proportion of drivers. I also assume we are all pedestrians at times as well.
Finally, I'm going to emphasise this again: the views on cycling expressed on this forum are almost without exception extremely moderate. You can find bike forums quite easily full of, well, nutcases. The type of place where news of a fatal car crash is greeted with positive glee - again, I've seen this - and that's just the start. You want to say those places are 'blinkered to their own failings'? That doesn't even begin to describe it. But it's a real, real stretch to apply it here.