Terrorism is (1) the attack (2) on innocents (3) for a political end.
You need all three elements.
If it makes the police chief feel better to label him a terrorist, go for it. But its an inaccurate use of the word.
You're saying he had no political end? lol.
What was his political goal?
He had a thing against liberals and minorities, so he chose to bomb directly a bunch of minorities, and then when that became too hard to keep pulling off he had to settle for trigger bombs to keep the liberal city full of fear.
He had a blog full of ultra-conservative and ultra-religious rants, and we are not even allowed to see his confessional tape for some reason, even though news stations and PDs are usually real happy to share other attacker's manifestos.
Source?
You won't find it all in a single article.
You can look at who the first 3 attacks got. Then you can look at the other attacks. Then his blog was in another news story.