I think this part of a larger Indic problem.
Treachery has always been part of our DNA, however in our history and our Pre-Sikh heritage we have never dealt with treachery.
There has never been any repercussions against traitors.
They're only a few miles from a masjid.
It would be better to help them organize themselves into a seperate space.
Only in the harshest of crazy circumstances would this be appropriate.
I don't think the line about Allah they read is out of line, so much as it's clearly against Rehit.
We don't let anyone do anything except Aikido, in line with our policies in the Dojo. Only the rare visiting revered cultural artist and the taiko drummers have been welcome. No other Budo even, let alone another heritage of system entirely.
We have had a few meditation types presented, studied with mentalists and psychologists though.