Stacks, odds and implied possibilities

[stokken]

55r

Stack 9K average is slightly lower, you are in BB with 8,7s

blinds 100/200( i think, cant quite remember)still rebuy

Utg has 6K and pushes no particular reads, there has been a few pushes from all positions

Mp calls has 12k, button flattcalls too with 15K

Would you move all inn?

This is offcourse a situation that is more or less frequent in rebuys. But it occurs from time to time when the rebuy is over or in a freezout, when a few shortstacks decide to tangel and a big stack takes his chanses. Would you take a shot regardless?
In the above situation it would provide you with cl and a healthy stack.
In a freezeout scenario how low, if that is important, would your stack have to be relative to blinds and average before you jump in.

Last; if you all where big stacks and the same confrontation came up in a freezeout, would you pass?