No kidding. But, just what the heck does that have to do with an obelisk?
Give me a break.
That particular obelsik was originally from Egypt. From Wikipedia:
"The obelisk symbolized the sun god Ra and during the brief religious reformation of Akhenaten was said to be a petrified ray of the aten, the sundisk. It was also thought that the god existed within the structure."
Pagan symbolism being incorporated into non-Christian objects isn't an issue. It's when it's mixed with the worship of the one, true God that it starts treading into dangerous territory.