My local hospitals are overcrowded to the point that the wait in the ER is measured in hours, my local schools are hiring completely unqualified people to 'teach', my roads resemble an artillery target range...
There are literally a hundred different things I could name off the top of my head that are not only BETTER uses of my tax dollars but that are far more badly needed than to fund another proxy war halfway around the planet.
In case you've confused me with one of those idiots, know that I briefly identified as a libertarian before I found out that didn't mean "like a Republican, except not a warmongering neocon loon" and how their theories worked out in practice. There's a book called "When a libertarian meets a bear" that was very informative on that angle.