We have this choice here, clearly it is a choice.
We can spare the life of the weaker (such as the frog), we can even care for them, we can help their living conditions, we could, in the case of the frog, create a little water pond, we could take the frog to a lake, we could literally be GOD for the frog.
We could be the FROG's GOD!
We can offer a paradise for the frogs!
Yet we could also be the opposite, we have that amazing power to create hell for the frog, we can boil it alive, we can skin it alive, we can eat it alive, we can tear its legs apart while alive, we can torture the frog just for "fun".
We don't need to believe in hell, we actually have the power to create it, so that is how to proof hell if needs be.
Thus we could be the FROG's SATAN!
We could enforce a hell for the frogs!
Regardless of karma.
Let's forget karma for a minute.
Let's forget rebirth even.
Let's just see this with ethics.
Choice #1 alleviate the suffering of another being, choice #2 creates more sufferings, much more for another being.
So what is the ethical choice to make?