It’s not so much that I believe it ‘by default’. Rather, when I’ve examined the historical case for the resurrection, the arguments that it really happened seem stronger than the arguments that it was a hoax, or a mass hallucination, or that he fainted etc.
I used Zotero all through uni, but I’ve recently discovered JabRef. Zotero probably has more features and polish, but JabRef has one killer feature: Your plaintext BibLaTeX file is your reference database. So you can version control and collaborate on your reference file with git. No export required.