When it comes to defense against foreign threats it is recognized that is one area that stands apart. That’s not about the government being involved in the life of its citizens and it said to be demanded by external realities. You can argue we have too much spending or activity on that front - I was satisfied that the sequester bill limited defense spending - but it does stand apart.
Unless one is a pure and faithful libertarian, there is going to be inconsistency. Human beings typically have sets of beliefs yet believe certain exceptions are called for because they’re just so important. On closer examination maybe they’re not but most people aren’t robots.
I’m not a libertarian, I favor small government, and there are many areas where I favor some activity. If I happen to favor robust action in a few areas, that doesn’t qualify me as a hypocrite. I’m not sure what those areas would be but my view is that government should generally be kept small and has overreached in many areas.
It is frustrating to many conservatives (but certainly not most) that GOP leaders don’t seem generally so keen on smaller government once they have power. GW Bush really failed in terms of smaller government. Reagan was imperfect but at least he tried.