Reply To: Can a “Kosher” Restaurant Advertise it also is “Halal”

Sounds unlikely, ubiquitin.
Are you aware that some Yidden in the Middle East refer to Hashem as Allah? It’s hardly different from us Ashkenazim calling Him the Eibishter.
I suggest you ignore your co-workers and consult your local competent orthodox imam!
A Gut Moed to all.