I disagree, I think it definitely is a political statement.
However, kicking someone out for "politics" at a sports game, where you need to stand for national anthems and 75% of the time they'll make you "honour" some random veteran is ironic and pretty disgusting.
I don't think anyone should be bothered by political clothing at a baseball game unless said politics are actively hateful, which "Canada is not for sale" is quite obviously not.
I'm not an Apple user but I've heard good things about the Alfred launcher on MacOS.