I am concerned that Evolutionism has become so prominent in our culture precisely because Christians have lacked the humble confidence to engage with evolution without the fear of upending their faith.
Excellent! This is my concern as well, though from the opposite direction. There are many scientists like Collins and myself who have many reasons to see something of value in the Christian message. But a Christianity which refuses to look at how evolution impacts Christian theology simply will not work for us. For me the reality is that I could never accept Christianity without evolution. Atheism always has and still looks quite reasonable and even appealing to me (I actually think it may be too good to be true). In evolution I find the perfect answer to the oldest and greatest challenge to theism from Epicurus 300BC known as the problem of evil and suffering. Because of that I can come down on this issue on the side of theism and Christianity, for not being raised Christian, there is little else to compel me to that side of the question.
P.S. For more details if interested, here is my reasons for belief and here is my take on Collins’ book and some of our difference.