The common law that existed for ages? The fact of the matter is the originator of the 14th, Howard, emphasised a class of people who do not have birth right citizenship while debating it on the House Floor:
"This will not, of course, include persons born in the United States who are foreigners, aliens, who belong to the families of ambassadors or foreign ministers accredited to the Government of the United States, but will include every other class of persons.”
You offer no source. Debate is not admissible as evidence. However, this comes from a Supreme Court ruling (linked previously) not some biased anti-immigration site that wishes to cherry pick quotes out of context....
http://www.law.cornell.edu/supct/html/historics/USSC_CR_0169_0649_ZO.html
During the debates in the Senate in January and February, 1866, upon the Civil Rights Bill, Mr. Trumbull, the chairman of the committee which reported the bill, moved to amend the first sentence thereof so as to read,
All persons born in the United States, and not subject to any foreign power, are hereby declared to be citizens of the United States, without distinction of color.
Mr. Cowan, of Pennsylvania, asked, "Whether it will not have the effect of naturalizing the children of Chinese and Gypsies born in this country?" Mr. Trumbull answered, "Undoubtedly," and asked, "is not the child born in this country of German parents a citizen?" Mr. Cowan replied, "The children of German parents are citizens; but Germans are not Chinese." Mr. Trumbull rejoined: "The law makes no such distinction, and the child of an Asiatic is just as much a citizen as the child of a European." Mr. Reverdy Johnson suggested that the words, "without distinction of color," should be omitted as unnecessary, and said:
The amendment, as it stands, is that all persons born in the United States, and not subject to a foreign power, shall, by virtue of birth, be citizens. To that I am willing to consent, [p698] and that comprehends all persons, without any reference to race or color, who may be so born.
And Mr. Trumbull agreed that striking out those words would make no difference in the meaning, but thought it better that they should be retained to remove all possible doubt. Congressional Globe, 39th Congress, 1st sess. pt. 1, pp. 498, 573, 574.
It is quite clear that the framer of this amendment did not wish for "aliens" born here to have citizenship. Again, hairsplitter, the fact of the matter is it is both valid and needed to revisit and clarify the 14th...the foundation for doing so IS there...and I think I'll be proven right. This is not to say it will be successful...the first visit, but then again, it just might!
A baby of an illegal immigrant has no “allegiance" to anyone or place, but that of its parents who are NOT citizens of this country.
That is not true. Anyone in this country owes allegiance to our laws, otherwise they could not be illegal immigrants. Further, the 14th contains another reference to jurisdiction...
nor deny to any person within its jurisdiction the equal protection of the laws.
...This has always been interpreted as anyone within our borders, except those who are not within our jurisdiction, i.e., Indians and diplomats. Everyone else is subject to the laws of the United States and state, regardless of their place of birth.