Nothing will change for 2 years at least. Next dem presidential contender will likely try to ignore the issue / walk the line (again). So maybe 6 summers until anything happens to stop them.
Witkoff and Kushner already have a "master plan" for Gaza. Witkoff mentioned the term in a 60 minutes interview to the dismay of Kushner, who stared intensely at Witkoff and stopped him.
The plan is of course to give beachfront real estate to the extended Trump clan.
A sternly worded letter is not going to stop it. Sell US treasury bonds instead.