It is easy. You don’t need to read the long winded article to find the answer.
Democrats/leftists/totalitarians want no possible resistance to their planned tyranny. A disarmed populace is a helpless populace. Therefore their number one priority is disarming the law abiding. Democrats couldn’t care less about crime, mass murders (except for their press arm the MSM to exploit them) your safety, my safety etc. they just want you to be unable to resist them and their beloved thugs in blue.
You call an article with 12 short paragraphs long?
I believe you’re correct, but that isn’t the Leftist thought process. They (on the whole) are not thinking “we want to rule over you, so we have to disarm you first” (be it true), and that’s not what the long winded article is saying (though, in erratic exploration, it may touch on that).
The Left began with the French Revolution, core imperative “Liberté, égalité, fraternité”. Among other things, you are equal to a school shooter if you share the only objective commonality: possess a gun. Have one, and you’re equal - and so must be disarmed.
Don’t confuse that with “we have to disarm you first”: that relies on the “in service to the Revolution” axiom - the only good is that which advances the Revolution, so if they need a gun for the revolution then having one is OK, and so is shooting you (you bad counter-Revolutionary you) with it; if you have a gun but don’t support the Revolution, then you don’t fit the exception and are merely a bad man with a gun and must be disarmed.