This is yet another, and perfect, example of these guys poorly handling what people are saying.
First notice the last thing they said in the OP, that "this needs significant more nuance." And yet what have they done here (and elsewhere time and time again)? They have ignored the nuance. Here they are responding to a non-existent statement. In other places they have cropped screenshots to not show the context/nuance of a full quote. Or they'll underline specific/individual words within an argument and respond only to those words, ignoring the context/nuance. Or they will complain that a post giving nuance is too long. But they somehow still want to say that nuance is needed? Strange how that works.
(Assuming they respond here, don't be surprised if they pull this same tactic against this very post: just wait and see if it happens as it will be pretty obvious.)
Notice how Brenton never said "God created all moral evils." Brenton said that God created all things and that "evil is within creation." This is nuanced (and ignored by ProvP, ironically) when Brenton rightly says what every single Christian should be able to agree with: "Evil would not happen but for God creating."
In other words, if God had never created in the first place, then evil would never have come into existence. This isn't even that complex (or controversial) of a nuance, but a reality affirmed by everyone who holds that God is purely and infinitely holy. But even this short little nuance is completely ignored. ProvP responds to this unstated idea "that God created all moral evils," when such a thing was never said.
Brenton rightly responds that God doesn't create, or author, evil because evil isn't a thing. It is not a substance, because teaching that evil is a substance is a form of dualism which, he points out, would be a heresy.
In the comments below you will find a link to two posts with many quotes from various Reformed theologians teaching exactly this. Will they take the time to learn this view? So far they haven't, so don't hold your breath. Will they argue against the stated claims and consistent teaching within the broader Reformed camp? Not a chance.
And yet... they want stuff to be more nuanced...
Call me a radical "free willer"/Pelagian but I think that believing and teaching that God created all moral evils disqualifies you from any eldership position.
At the very least this needs significant more nuance.