No one supports Hamas. The left support is for the Palestinians. While the asks for Israeli support are for the governments current plans and actions.
Hamas’s attack is a horror committed by a terrorist organization that we have no real influence over or responsibility for, and which is basically over, while the other is an ongoing war crime, with little signs of slowing, being perpetrated by a US ally. To some extent our tax dollars paid for the military that’s killing civilians and our support allows them to keep going despite international condemnation. If Israel chose to or if sufficient international pressure were brought to bear, they could not murder any more people. More innocent people die the more strongly the US supports Israel while condemnations of Hamas do nothing other than confirm evil people are bad.