[q1w2]

The article you link does not mention any memorials in Canada for this person - nor did they ever even live in Canada. He was shot by the Soviet security agents in 1950 in Ukraine while fighting for Ukrainian independence. ...and then his entire family was imprisoned to set an example to others.

There is also no evidence that this person committed any war crime at all. The notes in the link document that his military division committed war crimes.

Guilt by association? Collective punishment? Really?

[anticodon]

He joined the nazi forces, infamous Schutzstaffel (SS) during WW2. He participated in killing tens of thousands of Jews (and Russians, but that doesn't count in the western world anymore).

He isn't guilty by association - he was a leader of death squadron and he is directly responsible for extermination of tens of thousands of non combatants.

[q1w2]

These are all your guesses. The article doesn't say literally anything about him killing anyone or ordering anyone to be killed.

[anticodon]

Wikipedia is not 100% reliable and universal source of truth. Besides, he was a leader of the SS battalion and he got Iron Cross for his war crimes from nazies. Does such a person deserve a monument in Canada?

[kingofpandora]

Such a monument exists: https://www.theprogressreport.ca/monuments_to_nazi_collabora...