Can't say I agree, even considering his past. I feel that second shuffle that undercuts Kawhi is a natural motion and also to perfectly place his foot under his landing spot without looking? I don't know. I think it's a cop out calling it a dirty play.
"In that split-second, Pachulia was probably just thinking about getting a hand up. He probably didn’t have the foresight to think, “Man, what if I shoved my foot under his foot?” then stare at the ground, locate the spot where he needed to put his foot, and execute. Even if he did, I’m not so sure a big clumsy doof like Pachulia could execute."
Source:
Did Zaza Pachulia Intentionally Try to Injure Kawhi Leonard?
Gives both sides of the coin