Clearly, God just did this to test the scientists.
My sense is that a majority of anti-evolution folks have more of a problem with what evolution means than the actual truth of it. In other words, they think if they admit evolution, then every anti-theological, pro-materialistic assertion of modern society must be true.
One common counterpoint is that creation could have just as likely occurred on the sub-atomic and universe-wide scale and that life is in the cosmic plan.
But even if that’s not the case, it does not follow that evolution=materialism=lack of morals