Do you mean that all men became sinners because of Adam's sin ?
If so, you accept the " original sin " even though it is not explicitly mentioned in the Bible
Orherwise , if someone after Adam, did not commit any crime, how can you explain that nobody was allowed to enter the heaven, before Jesus's sacrifice ?
Moreover if Jesus sacrificed his life for the salvation of all people , extraterrestrials included , I suppose you expect an other advent to wash the sins of the last 2000 years and then an other one and so on till the end of the world..
Or should I understand that his sacrifice was valid also for future sins committed by the future generations , extraterrestrials included ?

P.S.

I apologizes if some Christians get offended of such easy irony
The point is that I stand on fundementalist side
Liberal christians try to explain in term of common sense what it is just a matter of faith
Either you beleive or you do not beleive
I dont...