That is what is called one-verse unitarianism. The verse has to be misunderstood by virtue of taking it apart from its context. That is a rookie error in attempts to interpret scripture. It is the way Christadelphians create their doctrine independent of the full counsel of scripture. The problem here is that the deity of Christ is treated as less relevant or something to be totally ignored when interpreting from Joh 17:3 alone.I only quote one verse at a time so you'll understand who God is and hopefully get a proper foundation to understand the rest of the passages.