This is a good illustration of a prevailing view among DP opponents. It troubles your consciences immensely that the state runs even a miniscule risk of executing an innocent person. You feel that any use of the death penalty unfairly casts you indirectly in the role of executioner. But should inaction by the state (i.e. judges and juries) result in the deaths of innocent victims at the hands of murderers - well, that’s the state’s fault and implies no responsibility on your part. Your consciences can remain squeaky clean.
But acts of commission are no different from acts of omission when the result is death of innocent people. We have a responsibility to fellow members of society, which includes protection from the savagery of sociopaths. There are very real and documented risks to preserving the lives of all murdererers which far overshadow the vanishingly rare possibility of executing an innocent person*. Supporters of the DP option cannot in good conscience expose potential innocent victims (who, it must be pointed out, disproportionately come from disadvantaged and minority groups) to the risks of murder and mayhem at the hands of the worst murderers.
And as there was an OP - no, Texas is not executing too many killers. As the backlog of pending executions held up by endless court wrangles eases, the numbers will drop…but not to the zero level desired by anti-DP activists.
*even the heartbreakingly innocent such as James W. Byrd. See above.