On the contrary: it shows the absolute cynicism and hypocrisy of the far right, for ever banging on about PC gone mad and free speech for hate preachers like Yaxley-Lennon, but turning into the most sensitive of snowflakes whenever it happens to suit.
Gills58 unwittingly used a poor expression in his post, was called out on it, and was big enough to apologise. But that was still not enough to stop a massive pile-on, with a dash of homophobia thrown in for good measure.
It seems free speech is fine if you're clever enough to simply imply wholesale slurs about certain races, religions or political persuasions, but woe betide anyone who speaks up directly against it. Then the pearl-clutching starts and it becomes clear that it's not at all about free speech, but about closing down anyone else's right to dissent.