You just may be right. Yes, those aliens exist, and if I hear correctly, they're gaining in power.
The old man's voice gained intensity as he continued.
However, the biggest enemy of Humanity is not them, but rather our own weaknesses, which they can easily exploit. Our divisons, our ambitions, our greed. The house will collapse around us, and nobody will even notice. Do we want that? Do you want that!?
The last was said with a slightly raised voice, and a piercing stare. Realising he'd been too extravagant in his outburst, the man relaxed slightly, and sipped some water.