In the context of "did Christ advocate for this" your answer may be valid (although biblical text has often been creatively warped to justify anything.)
However this article is in the context of "how did people, professing to be Christian, influence and alter the government and culture of the Roman state.
Clearly the collective beliefs of large religious groups permeate governments to this day. And yes the behaviour of some Christians causes profound embarrassments shame to the wider Christian body.
Ultimately when some group of Christians behaves in an intolerant, hypocritical, self-serving, shameful way, and does it while claiming Christian principles, then all Christians are tarred with that brush. And while I can argue that its people, not Christ, that acts that way, that argument will fall on deaf ears.
I'll conclude by pointing out thus is not limited to Christianity. Muslims suffer the same effect. Most in the west tar all Muslims based on the actions of a few. That's worth remembering when either you, or they, are lumped with extreme fundamentalists who profess the "same religion."