Right, so in your own words, you would have done two things:-
1. Asked the radio station why they invited them (and received the response given in the text quoted above), and
2. Not have went on the show
Now we know what you would have done, can you tell us why the consequences/outcome of these two things would be less worse than a pro working class progressive argument being aired, not just against the euro nationalism of the BNP, but also against the reactionary liberal anti-fascist argument put by the political mainstream. Why is the absence of a pro working class progressive alternative better than its presence?
Also it does seem to me that your biggest gripe here is actually with the radio station (hence my previous question) but you are somehow holding the IWCA responsible for what you see as a wrong move by the radio station