TL;Dr The Left is evil and therefore assumes that the Right is even MORE evil and can't grasp it isn't. Thus they assume the Right talks 'privately' about wanting to kill their opponent's children not realizing that... no we don't.

Start:

The Left does in fact constantly talk about using violence against the Right and not just against politicians they don't like but ANYONE Right wing, their families, etc.

The Right does not* but the Left cannot grasp that the Right doesn't descend to 'I want to kill Kamala Harris' children because I don't like her politics.'

When the DNC was hacked so was the RNC.

The DNC hacks showed clear intention/action to commit various 'frauds' (some of them hard to action legally like giving Hillary the questions to the debate some of them more actionable.)

The RNC emails showed very 'normal' political processes: Who do we get money from. So and so donor wants us to concentrate on this issue but... Where does the money go...?

To the extent the MSM covered the RNC hacks - little- they tried to make them out about 'dark money' and such but it was just normal politics. And DNC spokespeople INSISTED that there were 'other' 'darker' Republican emails because THEY CANNOT GRASP THE OTHER SIDE DOESN'T DO THEIR EVIL SHIT.

There HAD TO BE other emails where they talked about how to do vote fraud because 'OF COURSE THEY DO BECAUSE WE DO!'

That's the thing to grasp about this comment about 'a private conversation.' The Leftist subtext is:

'Well, duh, they were talking about killing an opponent's children, everybody does! The Right does it all the time! Wait til we find YOUR TEXTS you evil BIGOT!'

That's the 'read between the lines.'

The Left is evil.

Since the Right is bad we are more evil.

We are just better at hiding it.

That is REALLY HOW THEY THINK.

And, yes, they want to not only kill you but your children.