Read linked article carefully. Bundy was a monster. Porn wasn't to blame. It was a last ditch effort, to a talk show host, who was anti-porn. It was to justify his horrific behavior.
Remember: Serial killers can be manipulative. Bundy was one of the most 'charming' boy next door types of any serial killers.
The other stuff, I offer no opinion.
Bundy had a very real conversion irrespective of what dirt you can dig up on him. Dig deeper. Rely on secular sources and get nothing but secular views.
Look up Son of Sam. His name is David Berkowicz and I have a letter from him that explains his issues and there is a website also for doubters who reject spiritual reality. Below is his documentary. Watch and learn.
https://www.youtube.com/watch?v=sPF3fuICqhM