Ok so let's all gather into groups of a thousand because apparently that's safeAbsolutely. And your welcome to make up any figure you want about how many people were infected at the demo....100, 500, 1000 ?
Having said that... If in fact there was any significant infections by now these people would have passed it along to family and friends. It would be spreading rapidly. One would think these would eventually be picked up as illnesses or random testing.
But that hasn't happened.
The causes of the current community spread outbreaks have been identified. If you read the story you would be alarmed at how quickly and easily it seems to move through the extended family groups and into schools etc. There has been no suggestion that any of these outbreaks had anything to do with the rally.