The viewpoint of Rabbi Meir Kahane which is based on Biblical sources was that Israel should stand alone, without depending on allies from the non-Jewish world.
It is true that King David had allies from righteous gentiles that had the status of Ger Toshav.
It is clear to me that the Lebanese Christians are not righteous gentiles [or at least 99% of them, according to the lenient opinion of Raavad, as discussed in Chazon Ish to Shviit, siman 24].