What's really upsetting about this is the fact that despite everything he did, Silco is one of the first things on Vanders mind when we get a look into his head. It was stated in the first act of season 1 that what he did to Silco is something Vander has spent years regretting, but It's never been so obvious till now.
Vander was and is haunted by what he did, and even after being turned into a beast by Singed he still can't let go of it and the brother he lost. And the worst part is that we now know for certain that if Silco had found that letter, or tried to talk to Vander regardless, he would've welcomed Silco back with open arms.
But that didn't happen and Silco never came back, not that I blame him Vander literally tried to murder him. But still it's tragic that Vander spent years hoping for Silco to come back, only when he did it was to collect Vander's head.
And the fact that this is the version of Silco he remembers the clearest aside from the injured one speaks volumes. Like it's not the version of Silco that killed him, the version that attacked his family and hated his guts. It 's the memory of them being happy together at the last drop that he holds dearest to his heart, it really shows how strong their bond was and still is.
Like no wonder they were so both fucked up by it when everything went wrong.
