OK, in the US, copyright law allows "Fair Usage". Under this principle, a person - perhaps on an Internet discussion site such as TBR - can link to and quote a fairly small % of an article and not violate the copyright of the article owner. Other Fair Usage application contexts range from book reviews to academic publications. How US copyright law compares to other countries' I do not know, but the kinds of contexts in which Fair Usage applies suggests to me that other countries have similar laws and interpretation.
So, what do I think Canada is up to? Stifling public discussion is a possibility. Another possibility is that it is a way to loot and hobble Big Bad US Bogey-Corporations. "Both" is a possibility. While I use FB - mostly for people connections and almost never for news - I'm not a Meta/FB fanboy. In this case, though, a Big Bad US Bogey-Corporation is teaching the gooberment of Canuckia that Canadian news sources are not all that essential, and that those Canadian news sources will be the ones hurt, not Meta/FB.
For the terminally curious, FB's campus is in Menlo Park rather than neighboring Redwood City (see the top of the linked and quoted article). The campus is located off US 101 near the SR84 (Dumbarton) bridge. The campus was formerly the HQ campus for Sun Microsystems. Sun had other buildings on the Newark side of the Dumbarton Bridge, but MPK was their HQ.