I was working on a project in my yard, heard loud speakers, and an angry crowd. I thought there was a politically motivated riot nearby. Instead it was some very aggressive preachers ready to fight my neighbors if need be.

I don't disagree with the gospel message presented by them. I even believe in street evangelism, and open air preaching. I just don't think they read the crowd in this regard. A riot is something to be avoided, not stirred up. Paul's friends could recognize this at Ephesus and prevented him from any involvement (Acts 19). So should we avoid stirring up the mob, when we preach the truth.
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https://www.youtube.com/watch?v=zziJpfOWauA