From my own experience: traveling to Israel is very safe. Except for Gaza, which is pretty far away from every place where tourists will go.
A few years ago we've visited a Dutch sister who lives in Israel since the 80s. She had some nice stories about the jewish opposition against JW. They are getting some serious threats now and then. So funny when she showed a poster which was distributed in her region with the faces of her and other JW and a nasty text (I don't remember the words). But in general she was really positive.