Jesus, today, admonishes slavery
{I do not know of a single Christian who believes that Jesus says it is alright to own another person}
Jesus talked about us either being slaves to sin, or else slaves to God, etc...
But as for people owning other people or not, I don't think He actually ever directly addressed it directly, etc...
But, a person who was a slave in Israel had a very, very good life most of the time, etc, so much so that if their masters would try and release them and/or send them away, or set them free, etc, they would all but beg to be able to continue with them and stay, etc, as there were many, many provisions/strict rules in the OT for the Israelites in how they treated their quote/unquote "slaves", etc, as they were more like "very willing servants", due to how well they had it and were treated, etc, they didn't want to leave or be set free, etc...
Jesus, today, admonishes the killing of homosexuals for being homosexual
{I don't know of a single Christian who believes that Jesus says it's ok to murder homosexuals}
Ah, yes, your talking about God in the OT again, aren't you...?
Well, He was learning, and eventually learned you could not eliminate or do away with all sin by killing all of the sinners, etc, just didn't/doesn't work in the end, etc...
And Jesus I don't think ever directly addressed the topic of homosexuality directly and/or specifically, etc...?
Other than teaching/preaching general repentance from all sin in general or generally, etc...
Jesus, today, admonishes the drowning of babies
{I don't know of a single Christian who believes that Jesus says it's fine to drown a baby}
We already talked about this with the flood in the OT already, etc...
God, in the OT, DID sanction slavery
God, in the OT, DID command the murder of homosexuals
God, in the OT, DID drown babies
Already addressed.
God Bless!