By arguing you cannot determine if it is impossible, means it might be possible does it not?
Can you please show a verse where the entire context and intent are contained within it?
Then I can point a biblical verse that does the same and watch you explain how condemning Christianity based on one verse is impossible, but how Islam's entire thrust is summed up by one Koranic verse.
Isn't this is really about making generalization about something we do not have knowledge of?
Generalizations are dangerous and usually quite off the mark.