Propitiation

[Martin Marprelate]

"and He Himself is the propitiation for our sins; and not for ours only, but also for the sins of the whole world."

True.... just the sins for the whole world. We do not know about aliens. Maybe they sin as well and God sent a Martin messiah to take care of their sins.

But yes, if there are sins apart from the sins of the whole world then they would be excluded.

Excellent point, @Martin Marprelate .

It will depend on how you define 'the world,' won't it?
Is it the 'world' of John 12:19, meaning a proportion of the people living in Jerusalem. Is it the 'world' of 1 John 2:15, which, if anybody loves it, the love of the Father is not in Him? Or is it the 'whole world of Romans 1:8, which cannot mean more than a proprtion of the people living within part of the Roman Empire?
'World,' even the 'whole world,' does not necessarily mean all the people in the world. If you were actually concerned with the actual words of the Bible, you would understand this. Also, you would not add gratuitously the words 'the sins of' to 1 John 2:2, because they do not exist there in any ancient manuscript as I wrote before.