UKIP leader Nigel Farage told BBC Radio Scotland's Good Morning Scotland programme:
The idea that UKIP is some kind of horrible, nasty, anti-immigrant, racist party is not something that was evident to the rest of the country, but of course that wasn't what it was all about.
It was a demonstration dressed up as being anti-racism but in fact in itself was deeply racist, with a total hatred of the English and a desire for Scotland to be independent from Westminster. I mean, my goodness me, if this is the face of Scottish nationalism it's a pretty ugly picture.
The anger, the snarling, the shouting, the swearing was all linked in to a desire for the Union Jack to be burnt and extinguished from Scotland forever. There's absolutely no doubt who these people were or what they stood for.
More top news
It is "clear" ministers cannot proceed with the current Bill, Sir Keir said, threatening to "work with all sides" to ensure revisions.
Rain will clear eastwards through Sunday but it will remain blustery.
Donald Trump has indicated he does not intend to block the release of thousands of secret files about the assassination of John F Kennedy.