He's not going to get sacked.
We've been defensively poor since Moyes left, and Jagielka, Distin and Baines regressed/retired. Allardyce ended up putting 10 men behind the ball to keep us sound at the back, which was never going to work in the long run.
The sad fact of the matter is that the team lacks identity at the moment. We've chopped and changed on numerous times since Moyes left, going from a hard to beat workman like side, to an attacking team under Martinez, then went to a side that was capable on the break with Koeman, to one that put 10 men behind the ball with Allardyce, and now a far more expansive attacking side with Silva.
I'm not going to pretend that, since the derby, things have been going well - but the reaction from many members of this forum is embarrassing.
Silva needs to be given the support of the boardroom and the supporters if we are to have any hope of doing something substantial over the next few years. I understand that with them lot doing so well at the moment, it's an incredibly frustrating time to be an Everton supporter - but patience is key.