Not sure what you can do. Totalitarian regimes, whether they be political or religious, have the same basic problem - they're totalitarian. Don't be too surprised about the kids comments about Christianity (and Judaism) - they're taught all sorts of weird falsehoods about both. for example, Christians are supposed to believe in three separate gods: the Father, the Son, and the Virgin Mary (?). Oh, and we're apparently all deceived into thinking it was Christ who died on the cross, when it was obviously (?) Judas who was just made to look like Christ (?). And as long as you're essentially not allowed to correct them on their misunderstandings (because they can call the cops and claim you were proselytizing), they'll never know how wrong they are.

Now, this is in marked contrast to many muslims who've grown up and are living in Western countries. There tends to be a much greater appreciation of other religions and cultures.

But, the problem is the totalitarianism of the situation, not necessarily Islam. It was similar under the soviet system, when people were taught all sorts of nonsense about what life was like in capitalist countries, and religion, in general, was dismissed on the flimsiest of superficial grounds (cosmonauts went into orbit and didn't see God or any angels, therefore they didn't exist). Totalitarianism breeds intellectual laziness.

But, as for the laws forbidding you to purchase alcohol for muslims, I guess I could expect that. Just out of curiosity though, wouldn't them asking for you to purchase alcohol for them be an offence of sort? But, also be careful with this route as I suspect that your testimony in court would be judged to be of lesser value than a muslims. Sharia law works weird that way.

It'd probably be best to just drop it, mind your p's and q's (see what I did there?) and get out of the country when your contract is up. The current rise of Wahabism is making things more and more uncomfortable for westerners as time goes on. Just be glad you've got a country to go back to - there are many indigenous Christians in Islamic countries (eg. Copts, Maronites, Greeks, etc.) who have nowhere to escape to.