The study done by leslie kennedy and david forde illustrates that canadians do not judge acts of violence as selectively as americans.

That statement is false

Explanation:

It's the other way around. Their research shows that when the canadians put in the same situation, their judgement regarding acts of violence actually similar and consistent with the judgement made by the americans.

(this research finding is a little bit surprising because Canadians are more well known to have a more polite and gentle culture)

In general , their judgement regarding acts of violence can be influenced by their primal human instincts.

For example, the research  showed that:

-  both canadians and Americans overwhelmingly approved that acts of violence are justifiable if being done toward people who are broken into their house.  

- Both Canadians and Americans  overwhelmingly disapproved of acts of violence toward group of protesters.