So what? The fact that Hamas or its supporters produce fake anti-Israel propaganda doesn't mean that Israel isn't committing genocide. To suggest so is to engage in the fallacy of composition (https://en.wikipedia.org/wiki/Fallacy_of_composition):
(1) "Hamas produces a lot of fake anti-Israel propaganda" -> (2) "All anti-Israel evidence is fake" -> (3)"Israel is not committing genocide".
(1) "Hamas produces a lot of fake anti-Israel propaganda" -> (2) "All anti-Israel evidence is fake" -> (3)"Israel is not committing genocide".
You can't reach conclusion (2) from (1).