So the woman seen in various images under arrest was not spitting, pushing, punching or engaged in threatening behaviour. She, and a couple of others, were on the band stand and (presumably) refused to leave. There were dozens of police and a very small number of passive women. It would have been exceptional easy to arrest and remove these ladies without needing to put anyone in a prone position to put cuffs on. It was completely unnecessary and heavy handed.
It may be true that police vans were damaged, that there was verbal abuse, pushing and shoving, and minor disorder (although not caught on camera), but it certainly wasn't done by these 3 or 4 women.