Like ... LOLWUT... also WTAF?!? (to quote the so-called internet).
No, there is, literally, NO international convention that states "you go right ahead and starve out, thirst out, bomb into oblivion, displace, and downright try to eradicate people" under the "genocide convention".
You must be on the "happy cocktail" that the Israeli government claims released hostages were on.
This is some seriously "fucked up" level of shit!
Also, just so as to get "strictly formal" about it: while your claims would be wrong even then, even then: someone would have needed to invoke the genocide convention for your claims to hold any water. Nobody has done this ... regrettably! Someone should have, arguably! But, no, not in the direction you would have liked this one to go!