Maybe because this is wrong.
Concern with the determining effects of language is not a late 20th century phenomenon, the effectiveness of Powell's rhetoric is partly the result of having studied Aristotle under A.E. Housman.
IWCA wanted to come on to a bulletin board and argue for the validity of their whole, rather academic, polemic - seem exasperated, as is often the case that people have picked up on the
'wrong' bits and taken bits 'out of context.'
Unfortunately this is the way language and polemic, poliitical polemic, works, always has.
When Powell made the 1968 'rivers of blood' speech he cleverly ( and I really,
genuinely encourage IWCA to read it properly - because its, formally, a small masterpiece of rhetoric ) he consciously mixed his high style Oxbridge classical tropes with a letter to the Wolverhampton Post to the rhetorical flourish of the "tiber flowing with blood" at the end.
When someone constructs something like that you know what will stick in the mind and becoming, strictly speaking,
ideological ( if we understand the definition of "ideology" as ideas as levers, working on and changing the material conditions out of which they seem to be generated )
Powell knew he was constructing something which seemed to both have an internal coherence and be rousing and populist as something like a speech out of Henry V, something, that a Gary Bushell might get misty eyed about as "encaspulating" bully beef England while staying inside his "working class roots."
If Louis Macnice went to CCCS in the 80s he should have read Stuart Hall on Powellism and should be less naive and dismissive of ideology. If the IWCA want to fire up working class voters to defend their class interests they should be more dismissive of wordy and "impotent" ( butchersapron ) sociological verbage and more alive, like Powell, Shakespeare and ( in his dreams ) Gary Bushell to the suppleness and beauty of the English language as an agent of ideological change.
( OK, I know I'll get flacked down

So Ill fuck off the thread

But have a look at what you're writing and saying. It has more effect than you think. )