My point being is that scientists disagree with each other as much as religious groups disagree with each other. Disagreement within a group isn't a valid reason to dismiss that group's ideas, nor should we treat it as such.
Religions are as coherent and formal as scientific disciplines, if not even more so in many cases, especially within the same religion/tradition.
Would you then turn around and say that an entire scientific discipline is bunk simply because the outgoing president of an academic association disagreed with or had different views from the incoming president?
I agree with you that some religious folks argue in bad faith/polemics, and one of their tactics is to highlight the fact that science is not a monolith. I see that as a science communication problem, not as a reason to pretend that science actually is monolithic. It's tremendously important to embrace the ways in which science could change, the ways that science is intended to be flexible, the ways that science actually produces a kind of knowledge among other ways of producing knowledge. But it's silly to proclaim science as the only way of knowing things in the world, and then to say that it's entirely (or even mostly) internally consistent and without debate. Science is debate.