I'll grant you, it's an intersting case, but your conclusions are wrong.
You have yet to cite me a Constitutional authority that gives the Federal Government power over marriage, you've only cited SOTUS.
If you desire homo "marriage"
After you admit it, then we'll talk about semantics.
The constitutional precedent is from the English Common Law, which predates the promulgation of the Constitution.
If your conclusion were correct, then Utah would have been admitted with polygamy. States do have many powers, but their powers do not include redefining marriage.