Yes it is assault and deserves jail time and a hefty fine. Also barred from entering Canada.
The seal hunt protest was a publicity stunt by Bridgit Bardo. If this hunt should be abolished better include all hunting, killing of beef (meat), poultry, lobster where you dunk the live lobster in boiling water, all fishing because they are allowed to suffocate to death and about everything we eat that has to be killed to feed us. At least seal fur keeps us warm especially in very cold climates.
Seals are not disappearing in fact there are too many and are depleting the fish stocks.