If they are in Foreign lands (Non-Muslim countries), then, they have no right to ask for such thing. They must impose Shari'a on themselves, not others. On the other hand, If they are in a Muslim country (where Muslims are the majortiy), they have to impose Shari'a on Muslims and Non-Muslims and to ban the non-halal food (like Pork, Wine and Alcoholic drinks). That's what Islam told Muslims to do.
Had things stayed like what you had posted, then no one would have complained. On the other hand, we have radical groups in the Netherlands and the United Kingdom, which want to impose the Shariah law. They have also attacked shops selling non-Halal meat. Obviously, this is going to provoke a negative reaction from the native population.