I love Halal food, food that comes from a non forbidden source. However, I don't put up a fight when I cannot find it. I just go with the flow. Here's the deal, if I am in a Muslim owned store, I expect Halal food, it's what the owner says. I have little means to find out if the food is Muslim certified. I just have to have faith.
Those people I am speaking of make Islam seem like a handicap, not a religion about tolerance. For example, in France, many Muslims would put up a fight about being served Halal food. Their right, but they neglect in the process they come across as unreasonable, and wanting to be different than everyone else.
On one of my trips Roa and I met a French couple who were surprised that as Muslims we can eat regular meat from the grocery store (no pork of course), they thought we only can eat food killed by a Muslim person. That mentality shocked me. Then there are those people I have met who make sure to tell you "You are doing it wrong", "My Way or the highway" attitude. There's a room in Islam for both of us to be right, I choose to go with the license, they decide to make it difficult on themselves and amuse the rest of us.
But I found that people who strive for Halal food often miss the point of religion, which is to be a good example of tolerance. So often, you will hear Muslims living in non Muslim countries stressing the importance of Halal food. They feel they are entitled to, like the country owes it to them to cater to their needs.
Again, this is a business decision, if there is demand for something, supply will soon follow. However, I cannot be a jerk about it, if a store doesn't have such food, we can go with the license to eat food of the people of the book. But eating Halal food while being a jerk in the process does more damage to Islam than not eating Halal food.