The FLQ was a homegrown ethnic terrorist organization active prior to the 21st century.
The FLQ was entirely a homegrown terrorist group and aimed at a domestic audience, they had no influence or goals outside Canada. Ever notice how the FLQ, the IRA and the Red Brigades from Italy, never launched an attack outside Canada, Britain/Ireland or Italy. That is because, as loonie as they were, they had political goals. They could be politically defeated and were.
These groups were not an example of international terrorism like al-qaeda is. Al-qaeda is a problem because they are fighting a war against modernity and will eventually lose but may kill a number of Canadians before they fail. We are letting people into Canada who have ideological bases in countries that are failed states-Afghanistand and Pakistan for example, which we can do little about.
So, in conclusion, I'm not in favour of our open door policy for immigration any longer. We are letting far too many people into Canada that hate us and want to do something about it. Some are willing to continue this risk, not me.
Canada had had diversity and multiculturalism for a hundred years, it's no new thing here.