I have yet to read anything from anyone on this board that supports killing a child after it is born. Please show me where many people on this board have supported this.

I didn't say people here support killing a child after it is born.  What I am saying is that the arguments offered by many here for why killing a fetus is not killing a person can also be used in making an argument for why killing a toddler is not killing a person.  In other words, the criteria they use to determine a fetus is not a child could also be used to show that a toddler is not a person.  Of course, they wouldn't think of killing a toddler, but their argument logically progresses to that.