I think there is a selection bias here. If it succeedes the minority becomes a majority.
I think a good example are religious movements (obviously i dont want to equate religion with morality, but often they come with certain moral views attached). They start as a minority, and either they die or they take over. Christianity was a minority at one point.
a tiny minority can't but somewhere between 10% or a quarter is enough to pressure the rest to support them. for example to force the majority of restaurants to make sure their food is halal, because otherwise muslims would not eat there. or to port your software to run on macs, etc...
it depends of course on the cost of compliance. halal food is fine, because everyone can eat it. a minority of vegans could not force restaurants to stop serving meat because that would in turn exclude the majority of meat eaters.
While i agree with your general point, i'm not sure i agree with your example. i don't think a minority of muslims (or jews) are going to convince all resturants to stop serving pork, because bacon is too popular.
in some places i have traveled to that were predominately christian but had a minority muslim population, pork was very rare, and most shops and restaurants indicated that they were halal. now pork could have been rare for other reasons, but places advertising halal food clearly can only come from the muslim minority. although, maybe it was just muslims running all the restaurants. no idea. i don't know what it takes to be allowed to advertise halal food. i know kosher food requires an inspection by someone authorized. and it also takes considerable effort.
this example just came to mind from my observations. i didn't check any statistics other than the religions in the region. also i just realize, i don't remember seeing this in singapore, which also has a 15% muslim population. so yeah, it looks like you are right, and it is a bad example after all.