Fossil fuel train wrecks are never accidental. Antifa has been using this tactic, along with wild fires for years, now. They even derailed an AMTRAC train in Montana because it ran on the same tracks as the coal trains.
Most likely that coal train was heading to a coal fired power plant. Antifa would be a very good guess. Watch how fast the feds work to get to the bottom of this.
My guess is that they will have this solved by the 4th of never.
Not everything is a conspiracy. Derailments happen EVERYDAY on the US rail system. This is because old infrastructure. It comes down to simple return on investment. Most of these rail tracks were laid down in the 1800s. When labor was cheap. The cost to rebuild them today costs much more than these lines generate in revenue on a annual basis.
All of the major North American railroads(UP, BNSF, CN, CPRS, NS, CSXT) are major corporations. They make money by charging for transport of goods. Their profit is reduced by the cost to maintain existing rail lines. So, the less they spend on replacing ties, bridges, overpasses. etc the more they make. The more the CEO gets paid. The more their stock goes up in price.