I haven't got time to go through all the points that John raised, but I think he should recognise that his 'Artistic Wildman' persona would struggle to fit in anywhere, except perhaps in an artists enclave or on a commune. I like John, but he does talk an awful lot of shite sometimes.
Just a couple of points:
Kids have a huge capacity for learning languages, and there are plenty of people (both local and incomers) who have a very positive view of the Welsh language (myself included).
As for the people of Nant Peris - I know some really sound folk who live there or grew up there. John should realise that he is generalising on account of one or two individuals, with whom he clashed.
On the issue of sheep - yes, there are too many on the hills of Snowdonia.