"the leaders who are promoting the idea that Darwin's theory has no proof..."
No....this has nothing to do with the Church.
It is scientists who have testified to the vacancy of Darwin's theory.
While Darwin's theory posits gradual change due to the accumulation of tiny, random mutations, leading to brand new species, having brand new structures, and body organizations.....the fossil record has shown this not to be the case.
In an attempt to rescue Darwin, the most prominent neo-Darwinist, Stephen J. Gould has offered a new theory, the very opposite of Darwin's: Punctuated Equilibrium.
He says:
"The modern theory of evolution does not require gradual change. It in fact, the operation of Darwinian processes should yield exactly what we see in the fossil record. It is gradualism that we must reject, not Darwinism. [Â…] Eldredge and I believe that speciation is responsible for almost all evolutionary change. Moreover, the way in which it occurs virtually guarantees that sudden appearance and stasis shall dominate the fossil record."
— "The Episodic Nature of Evolutionary Change," The Panda's Thumb: Reflections in Natural History, New York: W. W. Norton & Company, 1980, pp. 182-184.
Do you understand the 'sleight of hand' he tried to get away with?
Gradual grad·u·al
ˈgrajo͞oəl/Submit
adjective
1.
taking place or progressing slowly or by degrees.
Sudden sud·den
ˈsədn/Submit
adjective
1.
occurring or done quickly and unexpectedly or without warning.
Tell me you find the two terms identical.
You should realize you've been hoodwinked.
Do you really not know the history of this? Long ago, when churches were fighting against the Theory of Evolution, there was the Scopes monkey trial, which you might want to Google. .
More recently, churches adopted a strategy of developing a theory called Creationism, in which the churches tried to pull the wool over people's eyes by pretending to be a science. If you really don't know anything about Creationism, you should Google it. There were never any Creationist research studies which proved Creationism. They merely said that the scientific theory isn't true, so the Bible must be true.
As with many strategies, this has evolved, with new names, and so forth. Notice that not all scientists are honest, and many times, when a few scientists dispute the vast majority in a theory that has been long researched, the reason is that those minority researchers are being paid. For example, remember that tobacco companies directly or indirectly paid scientists to claim that there were no proven health risks of cigarettes, even when there were a vast number of studies which showed bad health effects of smoking.
You are incorrect to think that punctuated evolution is sudden and unexpected. You may have been misled by the fact that more often than not, a scientific definition is different from the definition of a word in a general dictionary. Scientists define words in a technical way which fits into theories, and that is usually different from the definition of a word as used by ordinary people in ordinary conversations. What is meant is that several genes at once are selected for, but that itself is a gradual process as that small GROUP is selected for. And it's not unexpected because the genes that were selected for as a group were in the population previously. A group of mutations developed, which new genes then ended up working well together, so those animals reproduced more than the animals without that group of genes.
So this was not an overturning of evolution. It was merely a new detail about evolution.
It is also part of a more general question some areas of science has been discussing. For example, are geological changes always gradual, or are they sometimes catastrophic?
Religion is often a matter of winning a debate, which is what you are doing.
Science is a matter of constantly trying to find new knowledge, and constantly improving theories. Popper, Karl R. (1981) OBJECTIVE KNOWLEDGE, Oxford: Clarendon Press, holds that scientific knowledge is a serious of successive approximations to truth, each approximation being closer to truth than the previous one.
In contrast, religions usually don't try to improve their beliefs, although they could, and if they did, the work to improve their beliefs would be a science.
Jim