Can we please use some basic common sense here?
Birthright citizenship had a fairly clear original intent. It was intended so that the children of legal immigrants would be considered natural born citizens, and wouldn't have to go through the naturalization process or get a green card. The underlying premise was that foreign nationals would immigrate through the legal process and become full-fledged citizens of the US through the existing process, and that any children they had while in the US would be considered natural born. Those immigrant parents are allowed to hold several political and government positions, but they are precluded from serving as president... but their children would be able to serve as president.
What's happened is a bastardization of that intent. There are now two common situations that are abuses of the goodwill behind birthright. One is that of parents who enter the US illegally, are not actually allowed to be here... but if they have a kid that child gets birthright citizenship. That was never the intent. The other situation is one where parents who are in the US legally on Visas, but who are NOT actively seeking permanent residency, have kids while they're here to serve as anchors and make it easier for them to travel to the US, own property in the US, etc.
The intent behind birthrights was essentially "Hey, if you un-ass yourself and immigrate to the US, your kids won't be considered immigrants, they'll be considered full-fledged citizens in their own right!". Only a few developed countries have unconditional birthright citizenship... none of Europe btw.