I'm not trying to defend antifa trust me, but I don’t see that much of a connection. They allegedly sabotaged tracks earlier this year but went out of their way to warn them so no one was injured. Their goal wasn’t to hurt anyone or even derail, but to stop / slow freight trains carrying supplies.

We took precautions to notify BNSF (the train company) – we called them and we used wires to send a signal that the tracks were blocked.

It's a pretty huge step up to go from sabotaging freight train tracks (with lots of advanced warnings) to derailings high speed passenger trains. One is just a pain in the dick the other is straight up mass murder.

Anyway, that's just my opinion based off what's in the article.