What if 500,000 Gazans march on Erez (crossing point into Israel)?

On Friday, Hamas threatened that the 'next time' they will send 500,000 'Palestinians' to march on the Erez crossing point into Israel. Can Israel handle that kind of crush of civilians? According to Rebecca Anna Stoil of the Jerusalem Post, there is nothing to fear. The IDF has said in the past that it would respond to such provocations by utilizing nonlethal crowd control methods, and maintain