The Leafs haven't had any issues with Russians. The Leafs are capped out so, they aren't signing any big Russian players at the moment, and really the only two that have moved are Bobrovsky and Panarin. Leafs were on Panarin's initial list when coming from the KHL, and while I doubt we would have beat NYR, it's believed we were on his list of about 6 teams (NYR, LA, Florida, Tampa, Chicago). Leafs had no trouble getting Mogilny to sign for us in the early 2000s. Zaitsev chose here when there were multiple offers league wide. Multiple Soviet players have settled here post-career (Yushkevich, Antropov, Ponikarovsky, Igor Korlev's family, etc). When the Leafs were bad and had cap space in the Burke era, Burke refused to sign Russians or sign those long-term back diving deals.
The Raptors are a different story, and Kawhi was gung-ho on going to LA (and if it's to be believed he would have stayed if we traded for Westbrook/George and Masai said no, plus god knows how much tampering there was on the Clippers side). The Jays haven't had many issues with big name Americans. Look at all the HHOFers they got to sign in the early 90s (Molitor, Winfield, Morris) and they just signed Gausman and Springer who are two very in demand free agents. Also, the only issue the Leafs have had with Americans that I can recall are Jimmy Hayes and Mathieu Schnider.