Well, we don't know exactly what Russian diplomats may be up to, but it's probably no good. We know that Russia uses its diplomats to engage in intelligence operations and influence operations. We know this through the reporting of Canadian journalists who have reported how they try to pitch various disinformation stories to Canadian journalists and such.
I would absolutely favour reducing the number of Russian diplomats in Canada. Right now, there are up to 80 of them. I don't know what 80 Russian diplomats in Canada would be doing other than engaging in potential foreign interference.