Guest Jon,
It's true that at one time Welch schools actively discouraged the use of Welch.
That would have been down to the Local Education Authorities, not the English.
Consider also how native American children were educated around that time. Also Basques and Bretons and minority languages everywhere.
Be not so judgemental.

Not trying to be judgemenat Keith, and I can only lay claim to being English.

I suppose native Americans might be another one but I'm unclear in that. The bits of American things I've seen like references here to a constitusion aree (IMO) great (and if I understand it correctly, the right to free speach, or the right to a trial by jury are good things) but was there also an invasion of a native culture?

My own, limited understanding would say there was, but would I blame all Americans, I think not.