> morale boost to Hamas, prolonging the time until surrender.

I think this is key. The protest must condemn Hamas while supporting innocent people. Protests that support Hamas as some kind of justified resistance just prolongates everything. Hamas doesn't care for its people. It has an ideological system that glorifies death. Death is just a means to an end for them.

This is the problem of viewing things black and white. The whole conflict is varying shades of Grey.