Israel would "move people out of Rafah, the main humanitarian hub in the enclave, to al-Mawasi
Yeah, that's not their plan. There's 1.42 million people in Rafah right now, which is 25 square miles. That gives it a population density of 56,800 per square mile, making it the 25th most densely populated city in the world - and with intact infrastructure enough for only a tiny fraction of that number.
So, Israel supposedly wants to move all these people to al-Mawasi. Now, al-Mawasi is barren, with; the last official count I could find said there were about 1500 people living there in a small Bedouin town. It's also only about six square miles total.
Let's say that Hamas is 10% of the population - I don't think it is, but let's use that number. That means there's 1,278,000 innocent civilians they want to move to al-Mawasi. That would mean a population density of 213,000 per square mile. That would be twice the population density of Manila. And there is no infrastructure. They're just taking a million people and throwing them into a barren desert next to the sea and saying, "Not our problem." There's no food, no water, no toilets, no shelter, no medical facilities, no electricity, no shelter from the heat - and no way to quickly make any of these things appear in enough quantity to matter.
The Palestinians are already on the verge of famine. This will make things worse, and disease is absolutely going to decimate the population. And then they'll decide that al-Mawasi is hiding Hamas, and they'll go after that as well.