I agree with you. But there is a huge misconception on the death penalty in Texas. I have not read the article, but randomly killing someone does not make you eligible for the death penalty in Texas (unless it is a cop, kid, etc.). This would be murder, not capital murder.
To be eligible for the death penalty you must commit murder plus something else. Examples being:
1 killing a cop, kid, etc..
2 killing while committing robbery, kidnapping, arson, etc...
3 killing during an escape
etc
http://www.statutes.legis.state.tx.us/Docs/PE/htm/PE.19.htm#19.03
To those against the death penalty, have a look at these "victims" and do they deserve to live:
The subject took his two children to a creek, where he held them under water until their death. Officers located the victims' bodies in the subject's residence.
https://www.tdcj.state.tx.us/death_row/dr_info/muhammadnaim.html
In Galveston County TX, the subject stomped on his 3 month old son's head crushing his skull and then choked the victim resulting in his death.
https://www.tdcj.state.tx.us/death_row/dr_info/mullistravis.html
During the night in Dallas County TX, the subject stabbed a 32 year old black female with a knife and drowned a six year old black female in their home.
https://www.tdcj.state.tx.us/death_row/dr_info/greengary.html
The list goes on and on.
Juan Salvez Soria, who was scheduled to be executed on July 26, 2000, pulled the arm of 78-year old William Paul Westbrook, a prison chaplain from Livingston, into his cell. The offender tied a sheet around the chaplain's arm and tied the other end to a toilet; Soria began cutting Westbrook's arm with a razor blade. The offender nearly tore Westbrook's arm off.
https://en.wikipedia.org/wiki/Allan_B._Polunsky_Unit
The US Government is seeking the death penalty for Dzhokhar Tsarnaev, the man accused of killing and maiming people with homemade bombs at the Boston Marathon finish line. I don't see protests to save his life. Or is the death penalty ok as long as liberals say it is a really really bad crime?