Two comments:
1) No one in Alexandria knows that Sasha committed suicide, right? I mean all they know was she came out of the coffin dead. So they probably assume her death was Negan's doing.
Anyways, it got me thinking that we probably aren't seeing near enough suicides in this series. I think people would be offing themselves a lot more on the reg given the circumstances, especially with a hopeless leader like Rick. I realize this is within the scope of a zombie apocalypse so reality has to be suspended...
2) As far as relocating...wasn't that how they wound up in this mess with the Saviors? They tried to escape in S6 but the Saviors had every road blocked. Also, I think the "I am Negan" mantra is a microcosm of what is out there in the world. You could easily replace "Negan" with "evil". For a long time we didn't know who Negan was...it was just a faceless, bad dude and everyone was him. I think you could consider anonymous evil on a bigger scale, beyond the area where Negan operates, the same as you could the anonymity we had with Negan early on. You don't know what the evil is. You don't know how bad it can be. But you know that it exists. For all they know they could be trading one evil for another...ala the Governor for Terminus for the Wolves for Negan.