It's sort of a "isnt real if we dont acknowledge it" thing
 
So they apply the law strictly to people who try to base their political opposition to the issue. While ignoring the issue. Especially effective if it is distributed punishment, grass roots even.
 
Noting specifically Britain First and the BNP's treatment versus Telford. The former said things like the latter were happening and the community behind them shouldnt be in the country. Telford is just the apathy of the political class and police corruption. If the situation is different they'd have stepped in after a moving article in the Times