first: The eggs actually shouldn't be alive. I think that something happend to make them all cracked but not enough to kill them.
second: Perhaps the QSMP didn't try to kill them, because they're eggs, there's a high possibility that they are going to hatch soon, and maybe they just got eggnaped and that's all lol.
Third: Maybe the QSMP are making the eggs die slowly, or just playing with the parents, to make them feel dispair, playing with their feelings.
I might be wrong on all of them but please tell me your thoughts on it :)