You are suggesting that credible scientists are those that profess their personal belief in god? Isn't it fair to say those scientists lose their credibility by believing in the existence of something they can't prove scientifically? God is a matter of faith, not science. I have heard interviews with NDT where he stated that he is open to the existence of god if shown scientific evidence. How is that not scientific? As for the trans thing, I saw his interview with Ben Shapiro when they discussed the topic. I didn't hear him support anything non-scientifically. He was basically saying who cares how people express themselves or how they identify. Nowhere did he say trans people are scientifically or biologically the gender they identify as. His whole side of the discussion was that they have the freedom to express themselves however they want. Nothing he said defied science. The guy does lots of interviews and podcasts so if you've seen one where he says something otherwise I'll stand corrected, but I've not heard him say anything non-scientific on the matter.
Here's some food for thought; the christian community is always up in arms over people who identify as something other than what they had been up to a certain point in their lives. On the other side, christians believe they are born again, saved, and are different than their pre-christian selves. That's also a change in identity not unlike a person who was born male and now identifies as female or vice versa. When someone becomes a christian they don't change biologically or appear any different scientifically. They identify differently than before and express themselves differently according to how they now identify. The two are more similar than you might want to think. Maybe the real bias here is your own?