"Could we be testing God in our heart by doubting His Organization's view on this matter?"
There is a hidden assumpting made in that question.
It is that God's view is the same as that of "His Organization"
Another assumption is that "The Watchtower" is God's Organization.
The Watchtower has stated often that they are not inspired by God, and yet in this talk it is stated that questioning The Watchtower (or God's Oranization) is the same as questioning God!
Lots of Fuzzy Thinking in this talk!
The speaker should be reminded of 1 John 4:1, " Dear friends, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world. "
Any organization that claims to be God's organization must be continually tested in order "to see whether they are from God."