Both Watson and Crick have changed their minds about life starting on its own. Others such as William Lane Craig, PhD, Jonathan Wells, PhD, PhD, Stephen C. Meyer, PhD, Robin Collins, PhD, Guillermo Gonzalez, PhD, Jay Wesley Richards, PhD. and Michael J. Behe, PhD just to name a few. Maybe you are right, that most are irreligious but my statement that most of those in the 50's through the 70's working so hard to disprove our creator have now changed their minds.
Craig is a philosopher, not a scientist.
Wells is a Moonie who only got his science education to attack evolution.
Meyer has some training as a geophysicist, but none in evolution or the origin of life, and never worked in those fields (and was certainly never an atheist trying to disprove God through science).
Robin Collins is a philosopher (with some training in physics).
Gonzalez is an astronomer, does not work on evolution or the origin of life, and again was never an atheist trying to disprove God.
Richards seems to be a philosopher and theologian.
Behe is a biochemist, and is the only one of this list who does research even vaguely related to your claim. He does indeed attack unguided evolution, but that's not something he changed his mind about: as far as I know, he's always held his current opinions.
That leaves just Watson and Crick. Crick did indeed (with Orgel) speculate about extraterrestrial origins for life on earth, since he considered a natural origin too unlikely here. He later changed his mind about that, however, in light of more recent theories (see
here). I have no idea what Watson's views are on the origin of life (he certainly accepts evolution as the explanation for the history of life), and can find no reference to his views.
So the only scientist on your list who's actually worked on these issues and who has changed his mind seems to be James Crick, who came to view a natural origin of life on earth as being more likely.
I've worked with and talked to hundreds of working geneticists. I've never heard a single one express any doubt about the evolution as the explanation for the diversity of life. Your claim does not reflect the reality of the scientific community.