The British media reported this as a disgusting incident of racism.
So what did the defacement of the mural look like? What has shocked the public so much? It isn't easy to find this out. The media won't show it, of course, because one would expect it to be unprintable. What they will show is this:
which only leaves one itching to learn what despicable horror is covered with those patches.
I only managed to find out the answer by focusing google's lens on twitter. This is what has caused such a scandal:
The barely legible word there is "bucket". I dunno. The photos of the vandalism are so anticlimactic that they left me confused. If I had seen this on a wall, unprimed by the media, it wouldn't have ever occurred to me to interpret this in terms of race.
And yeah, Twitter, when uncensored, is better than traditional media. Much more authentic, immediate and raw.