
Quoting
BOR
US SC decisions are usually of a degree where there is no ambiguity in what is meant. Inferior Courts draw on other jurisdictions case law at times to decide issues, sure, I am not saying this is not true. Even one US Circuit Court of Appeals is not bound by another's decision, although according to the Rules of the US SC, this is one criteria to examine when granting certiorari, when Sister circuits conflict.
On the issue of same sex marriage, the US SC has already decidied such bans by states do NOT offend the federal constitution.
Oh, I might add though L v.T and Romer v. Evans are 2 cases proponents say can release an inferior court of the SC's Summary opinion I spoke of.