Ron Davies, the KKK targets in Western Canada were non-UK and Ireland (non-English speakers), at the time many coming from Eastern Europe, and the Unions plus Communists.

A quarter section of land was available to anyone who would promise to clear and farm 40 acres within a specified time. The lands were arable and plentiful, but had to be cleared of bush. Many of the takers were from eastern Europe and brought in free on the railroads.

At the same time, non-UK miners were being brought into the work force and organizers were trying to unionize the miners. Resentment against the settlers, and against union organizers and those who joined the unions created unrest which the KKK and business leaders united to suppress.
Blacks were essentially absent from the Canadian west (coastal B. C. was a different story) with the exception of one very small colony in Alberta and a few individuals in ranching.

The situation with regard to the mines was more complex in the U. S. Rockies, as WYSIWYG pointed out; union and communist organizers were stronger and violent struggles took place. I am not familiar enough with the problems there to comment.