These internal evacuations were essentially orders. They issued orders, gave (tiny) timeframes, and then proceeded to bomb the areas. The movement was largely left to those leaving, rather than rounding them up or organising it themselves. The result was chaos, which I suspect was partly what the IDF intended.
Like I said, I'm not taking him at his word-- I'm making this point because you appeared to be arguing that Biden's /stated intent/ was the same as Trump's in denying right of return.
I'm looking at actions, and arguing that those actions make zero sense in the context you're suggesting. If someone with access to a wrecking-ball arrives at a building with just a hand-drill, it doesn't make sense to suggest his intent is to demolish it, even if its technically possible with a hand-drill. If that was the intent his actions would be of 100x scale.