I think he’s just cautioning, as some of these people are plants trying to cause violence, paid for by Soros, so conservatives/Tea Party will be blamed.
I think that this is a very real possibility. We have to be aware that people who aren’t what they claim to be, and traps and hoaxes can occur anywhere, the Internet too. It used to be that phonies at tea party gatherings, for example, were easy to spot, but now these people are more sophisticated.