This thread has an inappropriate inflammatory title, and should be retitled or deleted.
Based on the news report it could alternatively be titled "Alaska resisted helping the US on Sept. 11th".
Presumably both Alaska and British Columbia have relatively few airports capable of taking heavy jets, and there was a valid fear of extreme congestion at these few airports if all in-bound and out-bound transpacific overflights were to seek to land at once.
The East Coast of Canada has many more airports capable of handling heavies than does the West Coast, hence the hesitation on the West Coast. No sinister Canadian plot I am afraid.