That's just dumb and ingnorant, considering that the best Euros play in the NBA.
It's a totally different game: slow pace, no defensive 3 seconds, shorter three point line etc.. There isn't much room in the paint for drives. Ben Simmons would probably struggle and a guy, like Kelly Olynyk would be a top3 bigman in the Euroleague.
You usually need to be physically gifted, to succeed in the NBA, top tier international/euro players are either black or white bigs. It's especially hard for white euro guards, for some reason they all have some major physical flaws like strength/quickness/size (Sergio Rodriguez, Milos Teodosic, Nando de Colo, Rudy Fernandez, Vassilis Spanoulis..) or don't have the IQ/skill/ballhandling (Mario Hezonja, Tomas Satoransky,..). They're talented basketball players who are more suited for FIBA ball and are definetely not scrubs.
The only white euro guards who made nice NBA careers in the last 20 years are probably Manu Ginobili and Goran Dragic. Tony Parker and Dennis Schroder have the exact same body type as Sergio Rodriguez, but they both have/had some of dat black quickness. Sergio Rodriguez's skill + Mario Hezonja's body is an All Star.
CSKA Moscow would easily beat that garbage Suns team, especially if they play under FIBA rules. What's so special about them? They're young, no system and have a 21-year-old stat padder who plays no defense as a first option. Dimitrious Itoudis is a boss coach btw.
NBA w/o international/euro players would be boring AF.