God, I'm so fuckin bothered about what season 2 did to Vander and Silco's past too, like. Nothing makes any sense.
In season 1, you get "sssssome years ago I guess, before Vander had his old man beard, he sliced Silco's eye and then tried to drown him and we're left to wonder the details". That's fine, I never even questioned that.
Then season 2 is like, "Vander went into a rage when he saw Silco standing over Felicia's dead body on the bridge, further evidenced by the letter Jinx and Vi find"??
And I'm like, NO HE DIDN'T??
Vander was already much older than he was in the drowning flashback. Silco would have been recognizable to Vi in SOME way if he had been there, and I'm extending that. Silco would have been in Vi's life before that too.
Vander picked up the kids and walked home calmly after Felicia died, and like sure maybe he lunged at Silco and he ran away, so Vander took out his rage on another enforcer instead and went to find Silco later, but that means he didn't just "lose his head", he had plenty of time to process what happened and NOT decide that he was killing his best friend "for the greater good".
Why would he have blamed Silco at any point, let alone in that way? I dunno, there's having anger problems and then there's being fuckin dumb. Imagine being like, "oh no, I lost a close friend, guess I'll burn the other one too!" BUHH???