Merry Christmas and whatever it is you celebrating in the end of december.
We hope to invade you next year.
Our plans are ready and we all got a flu shoot just in case if we get a cold, so the joke's on you.
We want you to stop fuck (is that the right word?) up your planet with your endless climate problems and mass destruction-weapons. We can do that for you, competly free. It won't cost you a thing, well except your lives and planet. So stay where you are, and we, Martains will come for you. Rest of sure, we will finish you all.
So merry christmas and happy whatever.
Kind regards, your destroyer!