The only poll watchers I have had direct contact with are of the Democratic Party. There is nothing wrong with poll watching, just do it according to the rules.
It wouldn’t surprise me to know that 99% of the voting populace are not familiar with the concept of official poll watchers and how to be one. That some people are “thrown out “is not alarming to me because they probably just showed up thinking they could be poll watchers. That’s not how it works, they have to register and follow rules.