An obligatory social gift and a tax differ relatively to the concept of reciprocity. The reciprocity in between a state and its citizens is not at all the same as the one in between two states.
For natives, the gifts were done in between different tribes or nations. In others words, a potlatch is an international event; consumption taxation is, for us westerners, mainly a national or sub-national event.
A rational person who is tempted to jump in to blaming the Muslims would welcome Muslims into Canada to verify and explore deeper his primary reaction.
It is not odd because the Bible is a much longer and difficult reading than the Qur'an. One develops more intelligent ways to live when he is forced to read books like the Bible.