I am also not convinced that executing the POWs will help, but that being said i think you’re overestimating the degree to which international opinion has any ability to impact this conflict whatsoever. It has been clear for a while now that neither the occupation regime nor its international allies care to mask their brutality anymore. They are not concerned about what anyone else thinks because they believe no one can do anything to stop them. And frankly i think at this point Palestinians just don’t and can’t afford to care anymore about the optics of their struggle either. It is life and death for them and they have to do whatever it takes to survive.