Since things have already escalated to this point...

It makes no sense for Son to step down as captain..
The right thing to do is to let him pave an honorable path toward retiring from the national team through the Asian Cup.
As for the '96 line, they shouldn't even be called up for the Asian Cup.
Even if the '96 line were to apologize, I don't think it would solve anything,
and it doesn't seem like they would apologize anyway.
I also don't think this is a question of whether Son has leadership or not.
Looking at the flow of things, if Son were to step down as captain, it would mean dragging out a problem that could have been resolved within this generation into the next.
And regardless of everything else, Son is not the kind of person who should step down as captain in this manner.
To be honest, while the Asian Cup is a major tournament and is important, it doesn't really matter whether we haven't won in 60 years or 70 years....