Earlier quoted context omitted.
Well he is facing 20 years
That's more than a decade less than what Chelsea Manning or John Kiriakou was sentenced to. It's absurd that the punishment is much harsher for unspecified theoretical harm caused by whistleblowing than the very real harm caused by literal murder attempts.
As far as harm goes Manning's leaks exposed the identities of a lot of people who cooperated with the US or the Afghanistan government against the Taliban. When the Taliban found out about such people they would go after them.
We probably will never know how many, if any, people got killed from being exposed in the leaks because there is no way to know if the Taliban found them out through the leaks or through some other source. The odds are pretty good that it was more than one, probably a lot more.
The swatting teen on the other hand is known to have not actually gotten anyone killed.
A crucial difference is that when the teen sent someone to your house they were not there to kill you. They were there to do something that sometimes goes wrong and does kill, but most of the time that doesn't happen.
Someone coming to your house because the Manning leaks identified you as cooperating against the Taliban was there to kill you.