It's what's known as the logical fallacy of the complex question.
http://philosophy.lander.edu/logic/complex.html
"...the fallacy of phrasing a question that, by the way it is worded, assumes something not contextually granted, assumes something not true, or assumes a false dichotomy. To be a fallacy, and not just a rhetorical technique, the conclusion (usually the answer to the question) must be present either implicitly or explicitly."
http://www.onegoodmove.org/fallacy/cq.htm
"Two otherwise unrelated points are conjoined and treated as a single proposition. The reader is expected to accept or reject both together, when in reality one is acceptable while the other is not. A complex question is an illegitimate use of the "and" operator.
Examples:
- You should support home education and the God-given right of parents to raise their children according to their own beliefs.
- Do you support freedom and the right to bear arms?
- Have you stopped using illegal sales practises? (This asks two questions: did you use illegal practises, and did you stop?) "
The phrase "The point is that Christians have implicit trust in their heavenly Father; they do not question what he tells them through his written Word and organization." has at least three pieces, not all of which necessarily go together.
First: "The point is that Christians have implicit trust in their heavenly Father." - Most people who identify themselves as such would likely agree.
The next: "... they do not question what he tells them through his written Word and organization." - is the point of contention.
It implies that
1. God has an organization, and that the WTBS has been selected by God to run it. - this is certainly debatable.
2. What some consider to be "God's Word" is certainly a moot point. No one has yet established exactly what this means and how to take it.
Certainly the phrase is not an acceptable "unit".