Yes, I think he was crazy and didnt have any ideological motivation - except that crazy people sometimes hate the good.
The first two people he killed were both black men who seem to have been involved in an altruistic clean up Austin campaign. One package (the elderly Hispanic lady) seems to have been a mistake, and as for the others that were sent through FedEx, their addressees havent been released, nor has the address and residents of the place with the tripwire.
The other weird thing was that he posted angry things about people being punished for too long as sex offenders. His father was a retired FBI agent, who seems to have had the same name as an FBI agent who was removed and imprisoned after his involvement in the sexual abuse of two young pre-teen girls (prior to becoming an FBI agent) was revealed. I dont know if the two names relate to the same person, but if they do, at some point the father had served his sentence and returned to his family.
At this point the facts are unclear, but Id say the bomber was a very angry, reclusive person (home schooled alone by his mother outside of a regular home-school network) who hated the normal world and hated the good because he felt he couldnt join either one of them.
So I dont care, if he werent already dead, Id want him executed immediately, but I think looking at the motivations might be interesting.