When the Ravens won the Superbowl they still had Browns players on the Team and the same owner and No one said the Cleveland Browns won the Superbowl. However, guys who are so desperate to find something to waive the flag about, even if it is has the Fluer de le and not the Maple Leaf on it, thinks this is a great moment for Montreal and Canada.
Here is a good article about the Browns, Ravens and Colts. One of the first guys in the comments section makes a great point also.
https://www.dawgsbynature.com/2017/12/15/16779036/browns-only-super-bowl-win-2000-ravens-season