What is so terrible about gene edited babies?

Anonymous
Dr He Jiankui claims he has edited the genea of the first babies using CRISPR/Cas9 technology. He has disabled a single gene that has "shut the doorway" that allows HIV to infect the body. The scientify community has denounced this and said it to be “deeply concerning”, “shocking”, and “monstrous”.
Why is it so horrible and unethical?
What is your opinion on gene editing?

www.iflscience.com/.../
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Is this the next step in human evolution?
What is so terrible about gene edited babies?
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