"You're saying that "true" Canadians really wanted to grow their families but stopped procreating because immigrants took their resources? What a ridiculous argument."

Canadian Tax Girl already stated a part of what I was going to say but I want to also add that not procreating in response to perceived hostile environments (which a constantly and expected-to-continue decreasing standard of living would qualify as) is ultra common in the animal kingdom.  So it is perfectly natural for us to reduce our birth rates and there is tons of data to support it.  So for you to call it a ridiculous argument shows you are absolutely uninformed as well as very likely ideologically driven.