What offended me most was not being called a witch or sorcerer or magician or whatever personal attacks they launched. (Btw, the one guy apologized for his personal attacks). The thing that offended me the most was that they didn't even know you, and they were condemning you. In twenty plus years of doing youth ministry, I've learned that you have to first establish trust, respect, and love with young people before you can preach to them....before you can reach them. Those men were there just to preach, not to reach.
The second most offensive part of their "preaching" was that it was faith without reason. They were unreasonable in their approach (preaching and not reaching), but also in the points they made. The man on the bullhorn exclaimed, "baptism doesn't save!", while holding a Bible. In our conversation, I pointed out that the Bible says, "whoever is baptized will be saved" (Mk 16:16). His main point was that we don't need the Church or the sacraments. I pointed out that Jesus said we need the Eucharist in John 6: "unless you eat my flesh and drink my blood, you have no life within you. Whoever eats my flesh and drinks my blood has eternal life" (53,54). To that he said: "you make a good point".
There were about twenty to thirty students gathered around him and me while we discussed these things. So, while I was focused on talking with him, I was really teaching them....many of whom were Catholic. One came up to me afterwards and asked, "so, when did Jesus give his power to the Apostles?" Matthew 16, Matthew 18, Luke 10, John 20, and other places, I answered (and had quoted all this to the man). He then asked, "how did they give it to others?" I said, "they ordained other priests and passed on the power...for 2000 years. It's called Apostolic Succession". He was taking notes at this point, looked up, and said, "Apostolic Succession! That is so cool!". Yes, it is very cool! So, all that plus the positive media coverage showed that God brought good out of this bad situation.