Do us a favour and stop going on about "some " versus "all the tribes". It was already explained to you at length why both are perfectly valid in their setting.The only explanation was a Coppo spin on the matter, which doesn't make it right, even though you always have a differing opinion in that regard as in, Coppo knows best as is always right.
I would suggest YOU, take note of the likes of your own words, differing aspects of the Kingdom of God and Seek out those aspects and THEN, come back and read the passage.
You seem to Ignore, pre the some standing here, Jesus IN FACT, touches on several subjects, different matters.
However, it would appear your blinded to this fact.
You also ignore the fact, Jesus pretty much says, he can do nothing of himself, effectively contributes all his achievements to God.
So, if they don't get a piece of the pie, what he's got, they got no chance of getting past, or through some of the doom and gloom he just mentioned.
Hence, for some comfort (a wrap up) he says, "some of you will SEE the Kingdom of God".
Expand