There was ton of confusion right after it happened. There was a lot of differing stories being reported. It was hard to know what to believe. Conservatives could not believe that fellow conservatives would do such a thing. That is what leftists do, not conservatives. After it was Barack Obama's mentor, Bill Ayers that set off a bomb in the very same building in 1971.
Antifa and BLM have been rioting, looting and burning buildings for a year but to the left that means absolutely nothing. It supposed to be their right. But let 300 conservatives cause less damage than Bill Ayers did in 71 and it is blown up to the worse than 9/11. I guess you guys worship the government and that is why you think it was so horrible. But what is the government without the people? I think murdering and destroying peoples lives by a bunch of misguided communist "useful idiots" is infinity worse than a little property damage to a government building. How many government buildings did antifa do far more damage to? But no lefty bats an eye to that.
As more information comes out it turns out it was a group of Trump supporters who went into the building with the intention of being peaceful and respectful. But something happen to change that.
If they ever released the security footage we would know for sure what happened