Genocides that invoked Yahweh will be justified with "they committed child sacrifice", children are still killed during genocides.
Similarly, the book of Jeremiah has sons being offered as sacrifices to which the punishment is being starved to the point the people ate their own sons and daughters
There's a bit of missing context above that verse there but it also kinda goes against the Jesus is coming soon belief:
"34Truly I tell you, this generation will not pass away until all these things have taken place. 35Heaven and earth will pass away, but my words will not pass away."
In other words there is an expiration date for this prophecy, Jesus just can't give a specific date.
Which is real convenient for Jesus since that means nobody could call him out as a false prophet until after he already died.