Understanding all about The Trinity Doctrine is not a salvation issue, but believing in the Deity of Christ (believing that Jesus is God) and honoring Him as God, is a salvation issue, as many Scriptures declare, such as John 8:24, John 5:23-24, Romans 10:9-13.
I don't believe that regardless of what the bible reads. If God is so petty as to destroy someone for not understanding some cryptic, obscure doctrine so as not to understand his true nature, he deserves no worship.