I allowed my homesick Israeli wife to leave Canada,where we met, married and set up home, to travel to Israel, with our toddler ,to spend time with her family and to “recharge her batteries”. She has been there several months already, and wants to stay on even longer. I don’t want to pressurize her but I miss my son desperately and I am afraid that I might be making a mistake if I agree. Am I at risk if I don’t demand they come home now?

Yes, you certainly are! If you allow your wife to remain in Israel with your child you are at significant risk of “acquiescing” (agreeing after the fact) to your son’s continued presence in Israel and providing her with a defence in civil child abduction proceedings which you could invoke in Israel, to get your son ordered home to Canada. If your wife keeps your child in Israel against your will, this is known as “wrongful retention” and is a form of passive child abduction under international law binding both Israel and Canada in this matter.
Furthermore, you have a limited “window of opportunity” to invoke Hague Convention child abduction proceedings in Israel, for a “prompt return” order of your son to Canada, and the longer you delay bringing action, the more you reduce your chances of securing your son’s return.