Yeah, it seems pretty easy for them to get a heter when kosher is the only available stuff for them.
I think the OP was asking as a business question. Is it a good idea of trying to attract more Muslims at the risk of scaring off Jews? It’s worth mentioning that the Muslim communities in Europe (where the OP is concerning) are very different than those in the US. Here in the US, we have conversations with our Muslim coworkers, and they stay friendly and respectful (I’m sure there are some exceptions). We have decent vetting here (even pre-Trump). In Europe, they’re more or less straight-outa-Gaza.