No there is no disagreement between libertarian philosophy and libertarian politics.
That is why the libertarian agenda is homosexuals in the military and immigration and homosexual equality.
How about you get government to not recognize marriage before you promote gay marriage equality and homosexuals in the military.
I believe if you check, there’s been far more support for that from so-called Republicans in power than libertarians or Libertarians. My agenda and those of little-l libertarians I know and correspond with does not begin with promoting military homosexuality, random immigration, pulling back and disbanding the military and the State Department, etc.
Or do you also believe as, say, Lindsey Graham does? Amnesty for all, gay marriage should be promoted, etc., etc.? After all, he’s a prominent Republican leader, so he exemplifies all your beliefs, right?