Because killing your child and buying a tool for protecting your home should be treated the same...
I love how every part of this post is wrong.
No children are killed in an abortion. A gun is a weapon, not a "tool." And owning a gun makes your household less safe.
What do you think an abortion is?
The termination of a fetus. >99.9% of the time, this is done before a. the point of viability and b. the threshold significant neurological development and activity.
No, it isn't. You're just making up a statistic. Viability is a completely arbitrary distinction in determining value, as is what you consider to be significant neurological development. This is a child, regardless of whatever competency tests you want to introduce. A very young child in the first stages of development, yes. Just admit you don't think these children have any value.
And of course 'viability' is itself a goalpost that moves as medical science improves. Using viability as a standard for personhood leads to the farce of a given 2015 fetus being a person but not its 1970 counterpart.