With respect, Masaka.. I think you're painting with a rather broad brush by these comments. I hope you enjoyed your job.
Perhaps it's different here these days. I certainly have regular conversations like that amongst my ex colleagues. Incidentally for the purposes of doubt I was not in any way suggesting that ASD are in any way linked to poor parenting. I can see how you may have perceived a link, given the topic of discussion. However that link was not intended. I freely admit to having doubts about ADHD, in some cases. My personal view is that I believe that they can identify a genetic cause in about 1/7 cases. My own experience would suggest that that is about representative of the true cases I came across in the classroom.
As for ASD I am interested in what you think the causal factors maybe? Obviously there can be and probably are multiple factors involved, and I don't discount the continuum theory.
If I was a betting woman, which I am not I would put my shilling on:-
1) A link with premature births somewhere along the line.
2) The constant stimulation of our electrical gadget driven age, and it's subsequent effects on developing brains.
3) I also remain unconvinced that there is not link with vaccination damage somewhere. I rather think that the discredited research into this might well be Un discredited sometime in the future.
As for the second part of your post - did I enjoy my job? Not towards the end, partly because I was increasingly ill, and partly because the resourcing was so inadequate. The management strategy in the schools I worked in was essentially what the American's call "main dumping". Dump the children in the mainstream setting, with the minimum levels of support they can get away with, and hope for the best. The percentage of the prison population in the UK, with some form of Special Educational Need would testify to the failings of that approach.