I’ve always seen the “context” of these guys that talk about LBJ whacking JFK as whackos.
The same way you see people that are suspicious of Obama’s dubious mysterious past referred to as birthers. You’ve got your LBJ defender trolls just as you have your Obama defender trolls. They try to make people seem stupid for questioning the propaganda they are being fed and it’s more often than not a successful method for shutting people up.