Edit: It looks like the argument here is that the US is not calling for an instant ceasefire, but instead saying that one is very important to have. China and Russia say it should be immediate. The US also tied it to hostage talks.
Another resolution is in the works to call for an immediate ceasefire, but the US is expected to veto it because they believe it could endanger hostage talks.
So I want to be upfront and say I don’t really agree with their argument, but I do understand it. What Russia and China are saying is by tying the ceasefire to the release of hostages is unfair to the Palestinian side. This is because they lose all leverage and then would be easy targets for Israel who doesn’t seem to mind bombing Palestinian civilians.
My issue is that technically the only reason their bombing is because of the hostages and perhaps if they release the hostages peace talks can begin. The opposite of that argument is it will allow Israel to be even more aggressive after the temporary cease fire is ended.
I don’t know, but that’s the argument.
Historically ceasfires have been used by Hamas to resupply rockets for the next rocket barrage on Israeli civilians. A ceasfire without hostages being released would be nothing more than a failure on the Israeli side, so would not be accepted.