I can't see this as being correct since El Al can't issue a BA refund. And you almost certainly don't want a refund. The whole issue is academic at the moment, there are going to be no flights from TLV or AMM for at least a few days, maybe longer, so I would urge you to just hold off until the situation improves. AMM is closed for the rest of today and I can see cancellations for tomorrow too. You are just in a situation where flying cannot happen for a while, and it's not useful to try and rebook anything right now.