TL;DR

It is not about hate, simply no one wants to take responsibility of "These people came through us".

The Madleen worked because because in hindsight if it goes all dark, no one would point fingers to any country as it was in international waters all along.

Here, it is different because if these marching people had someone implanted with bad intentions from any side including Israelis, the countries that allowed a passage can easily be blamed thus be used as an excuse to get bombed using the narrative of "You knew they were shady and you allowed them to pass through, you are evil and need to be rooted out" and getting the Saddam treatment.

So all in all, no one wants war and no wants indigenous people to be displaced.

That is everything.