The street corner
Stand on a street corner or in a square grab a microphone and blast the by-passers with passages from the Bible. Or worse, just verses isolated from context. And keep doing it, telling people stuff they have no idea of the meaning.
That's the Harangue. Even if you have colleagues handing out leaflets (please don't call them 'tracts'. No one knows what that means), engaging in conversation and offering to pray the sinners prayer, I doubt you are following in Paul's footsteps. Certainly our Lord told us not to pray showily in public (Matthew 6:5).
Paul slipped in to the culture of time and place and made sense to the hearers (Acts 17). The Harangue does not.
I saw a video of a quasi Harangue at a Muslim street fair for Ramadan (the Islamic knock-off of Lent). There was a bit of engagement, I was gratified to see. But no evidence of the real work. And maybe that was not shown at all.
The real work
This is working through the crowd either with or not a satchel of leaflets and Bible books, engaging people in conversation, perhaps assisted by provocative T-shirt slogans: "Is Issa Allah?" or "Is Allah 3?"
In an effort to Muslims the starting point has to be the keen religiosity of many,
Perhaps our common ground where the Quran calls as "people of the book" on which we should stand (The Quran instructs the "People of the Gospel" to follow the teachings therein: Surah 5:47). or that we are the worst of people!
Then we could raise that the Quran shows that Isa is God Surah 3:49, Surah 5:110 , or that Allah is three in one Surah 9:31.
These could be T-shirt slogans or handout leaflets,
We might also have copies in relevant languages (Arabic) of John and Luke's gospels along with extracts of stories the Quran jumbles from the Torah.
We might even have QR codes for Bible downloads. Is there a book called The Book for Muslims? We might have the Prophesies of Moses (extracts from Torah) or those of Issa to give.
Handouts on Issa and the Quran and Musa (Moses) and the Quran or Quran and Injil could be very helpful to straighten out Islam's errors.
