Also, if you scroll down to Figure six in that article, you can see that firearms assaults are up as well as suicides with Assaults be the bigger increase. So crime.
True, also Figure 6 expanded the data set to ages 1-19, while the initial paragraph and table used 1-17.
I'm not by any means defending that article, it's twisting statistics. I just provided the link, because it's the "study" mentioned in the OP link.