You could read the judge's close to 200 page opinion on why he ruled the way he did, based on law and the evidence presented in front of him. It's publicly available: http://www.dcd.uscourts.gov/sites/dcd/files/17-2511opinion.p...
I hope this will be appealed, and this monstrosity prevented. And someone should also split Comcast, i.e. separate their ISP business from the media one.