From a historical perspective at least, and Ferrari don't seem to be consciously sabotaging Sainz and Leclerc's races, they're just fucking idiots. As per Hanlon's razor, never attribute to malice which can be explained by stupidity.
From Ocon blocking Alonso at this race to his unnecessarily aggressive overtaking at Jeddah, to his flat battery a few races back where he was left stranded on the grid, to that piss-poor safety car strategy at Canada, it just seems to me Alpine are ratfucking Alonso for the hell of it to get him out of the seat for Piastri.
And well, you got what you wanted Alpine. Except now you don't have Piastri, the whole reason you want Alonso gone. So what's the next step of your masterplan?