I am very familiar with the Canada goose. Basically, they are evil incarnate and woe be the person who accidentally walks down a sidewalk in the middle of downtown too close to where a goose has decided to nest.
Most birds find out-of-the-way places to build their nests and raise babies in safety. Canada geese are like, "I see this busy plaza has a small patch of garden in the middle. I will nest here and attack anything that comes within honking distance."