That is all part of takkiya. They are permitted to drink whiskey when in infidel countries in order to blend in end use all devices that enable Jihad but all that will have to go away when Islam triumphs and there are no more infidels. Practically speaking it will all go away in such a case because a Moslem society with no non Moslem nations around them to trade with or steal from cannot produce or maintain anything like modern technology. They must revert to what they have always been i.e. herders of sheep and desultory agriculturists.
Interestingly, there are passages in the Koran condemning emigration into infidel societies. Takkiya must supersede that if the emigrants are infiltrating the infidel countries to convert or destroy (same thing) them.