From Ynew News:
Ian Anderson, Jethro Tull's soloist and flutist, is still planning to come to Israel. 'I don’t think any of us should succumb to terror, I am afraid of coming to Israel but I am also afraid to cross the street'
As of now, it doesn’t appear as though the concert is likely be cancelled.
Here's hoping he doesn't do a Roger Waters' on his visit here.