So many good points here.
For one, we think of Sufis as the "good" and tolerant Muslims. But did you know that the main religious cheerleader for the martyrdom of Guru Arjan Dev ji was a Sufi Muslim leader from Sirhind (a huge city of that time)?
His name was Ahmed Sirhindi, and he was a prominent member of the Naqshbandī Sufi order. Supposedly he was a big philosopher. Here's Brittanica on him:
In refuting the Naqshbandīyah order’s extreme monistic position of waḥdat al-wujūd (the concept of divine existential unity of God and the world, and hence man), he instead advanced the notion of waḥdat ash-shuhūd (the concept of unity of vision). According to this doctrine, any experience of unity between God and the world he has created is purely subjective and occurs only in the mind of the believer; it has no objective counterpart in the real world.
So you'd think this guy was just living the life of the mind, right? No, he was a fanatic who encouraged the Mughal emperor employ policy of radical Islam (also known as simply "Islam") and to execute Guru Arjan Dev ji Maharaj.
This fool's tomb is hardly a mile from the site of the execution of the 2 younger Sahibzade at Fatehgarh Sahib. It's huge complex called Rauza Sharif, and it's quite popular with Muslims. You can also see a few stupid Sikhs visiting the tomb of their 5th Guru's enemy.
Note: I'm not saying all Sufis are murderers or encouragers of murder. I'm just saying keep your eyes wide open.
Just one more thing: Where exactly was the stall situated (so we can prepare our response for upcoming Nagar Kirtans).
Was it on somebody's front yard?
Was it on a sidewalk?
Or was it in a stall allocated by the Nagar Kirtan organizers?
Also, were there a lot of Sikhs perusing the books or talking to them? Or were they being ignored by our peeps?
Well, as I mentioned above, it's unclear what the specific situation was where they were located (sidewalk, private lawn, etc.). We may or may not be able to legally stop them from setting up a stall.
But, yeah, I agree the reason they target us is they perceive us as weak.
Even if we can't boot them via the police, we can swarm their stall with knowledgeable Sikhs. We should be prepared with a contingent of Sikhs to do parchar to Sikhs, and then also contingents to debate with any non-Sikhs that show up.
It's like an army attack. Army vs. army is a fair fight. Prepared Muslims vs the average unprepared Sikh is a slaughter. Anyway, the the knowledgeable Sikhs will debate the Muslims, while the average Sikhs can stand around and watch, and get enlightened instead of being bombarded with false factoids by the Muslims.
If they get the message that that's what's going to happen to them every nagar kirtan, then at some point, they'll stop showing up to nagar kirtans.
Another tack we can take is to make it clear to them that we have no problem with them following their own faith, but if they're going to try to convert Sikhs, then we'll return the favor with a stall every Friday at their mosque. I have a feeling they'll back off.