This is just misinformation, it's basically a political post.
What does "widely" matter in the 21st century?
Going home to my suburb vs a town 1000 km away (both in the US) matters why?
What evidence do we have these protests particularly spread the virus vs shopping?
No have no evidence it spread the virus at all, 'if' that matters a great deal. Many scientists don't think it does, and many do.
So call it for what it is, the Guardian wants to hit at Trump supporters.