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Hanlon is a traitor. If he was a memeber of the Enclave talking bad about the Enclave, I have a feeling you would write off everything about him as well.
Hanlon seems to be a man suffering from post traumatic stress or a bad case of who gives a [censored]. Point is for whatever reason he turned his back on NCR. So when he says "oh well they are chasing ghosts" could very well be just him down playing it cause to him the Mojave is what is important and since Kimball and the others don't agree with him, he became disgruntled.
I doubt Hanlon is in charge of all Ranger forces in the NCR. So he wouldn't really know of what is going on in Baja. To him all that matters is the Mojave and anything else is not important.