I fear you are correct that Obama has set a precedent. I believe that is exactly what he intended to do.
Fraud is a poor precedent.
There is no precedent if the ineligibility of the office holder is successfully challenged. It’s arguable that any claim of precedent is weakened by repeated, unsuccessful challenge, barring any definitive SCOTUS ruling bearing directly upon the matter.
So, going all Joy Behar and saying “so what, who cares?” is not the best course of action, even if you think the “issue” is not an electoral winner. There is more at stake here, the very electoral process itself, as far as the Executive Branch is concerned.
I, for one, don’t want some future Soros protegé attaining the highest office in the land. We’ve seen the damage done by this comparative piker in a little over a year. Imagine someone a little less inept giving it a go. We’ll all be citizens of the world in no time.