Well, the very first song that came to mind, that is indeed about isolation and persecution is THE BALLAD OF IRA HAYES. But that's not appropriate.

So then just trying to think of "appropriate for Anne Frank", and not worrying about isolation and persecution, I came up with some possibles:
Last Night I had the Strangest Dream
Blowin' in the wind
Where have all the flowers gone

A better one might be:
We Shall be Released

And two other Dylan songs, not as well knows as WSBR and BITW, would be CHIMES OF FREEDOM (from Another side of Bob Dylan) or DEATH IS NOT THE END (from Down in the groove). The lyrics to DEATH IS NOT THE END really fit well, in my opinion.
On a bleaker note, I thought of Neil Young's DON'T LET IT BRING YOU DOWN. It's certainly about isolation ("old man lying on the side of the road with the lorries rolling by...")

nancyjo