The picture that's developing is a pretty broad-scaled, nationwide, white-nationalist conspiracy that includes law enforcement and military elements. This is going to be too much for a lot of people to want to believe, including U.S. leadership, so the concern is that it'll get swept under the rug.
Sure as shit: if this isn't acknowledged and fully investigated out in the open, it'll continue. Do people really think this was some kind of fluky, spontaneous occurence? Mark my words: ignoring it won't make it go away, and next time will be worse. All three houses will now be in Dem control, making it an even bigger target. It didn't end with OKC, and it won't end with this.
Additinal actions are probably already planned if not in the works.