This article is premised on a redherring, and its also factually incorrect on a few things. The first thing its factually incorrect on is that even if the legislation had passed, it would have done nothing to prevent this. If the FBI agents investigating the older brother found nothing, there is nothing legally saying these guys are different from anyone else in the US and they are granted the rights and liberties of all americans. Background checks are useless when you're dealing with sleeper cells or psychopaths.

My personal feeling is that small bombs are the tools of cowards and terrorists, and cowards are unlikely to pull out guns and start shooting. Crazy people yes, but cowards, no.

I also usually ignore arguments involving "the NRA has herpaderpa yadda yadda". The NRA has power because there are millions and millions of gun owners in the US who are tired of the negative story shoved down peoples throats. Gun crime is so miniscule in this country compared to other types of crime, and those comitting the crimes don't even fall under the veil of legal gun owners anyways, so NRA members are being demonized because people don't understand how the world works.