Why are parenting skills not considered a legitimate critique?

Why are republicans trying to avoid this issue like the plague? Why are republicans confusing this as attacks and insults against her children?

If someone called her children incestuous retarded degenerate pot-heads, that would be considered an attack or insult against her children, but this is actual criticism of Sarah Palin’s parenting skill which would reflect on her ability to lead as Vice President and potentially President if anything happens to McCain.
“S”- You didn’t read my question did you?

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