Yes.
No I don't think it has come true.
I think his speech was a very clever attempt to whip enough hysteria to enable him to be a real threat to Heath. He was very close to being able to challenge Heath as leader of the Con party. The timing of his speech appeared to be very calculated, however I do feel that he was a conviction politician.
He used highly emotive language that captured ill founded, ignorant fears that white people had/have. People hearing his speech stopped thinking and just started feeling and feeling fear. Yes there are racial tensions in this country, but humans through out time separate into groups of them and us, whether the divide is geographical, religious, across class and this division leads to hostility and on occasions violence. If you follow a Marxist analysis, the divide, the them and us is fostered by the very powerful elite as if we are too busy burning and destroying inner city areas that are already decayed, we will not have time to stop and consider the huge wealth inequality that exists between fellow white men.
I am enjoying the White series so far and look forward to the next programme.