Darwin influenced/inspired Nietzsche. Nietzsche influenced/inspired Hitler.
Why the antagonism toward God and those who follow Him?
My antagonism is for the religious nutcases like Jim Jones and his kool aid drinking followers, the nutcases in the vatican who made galileo renounce his now proven to be true theories, the psychos of the spanish inquisition and the nuts who burned "heretics" at the stake
AND THE MORONS WHO ARE WILLING TO DO ANYTHING INCLUDING TO BASH EVOLUTION TO THE POINT WHERE THEY WANT TO LINK DARWIN TO HITLER.
Sorry, but entirely wrong on the first point, and mostly wrong on the second.
Nietzsche (for whom I hold no brief) had neither understanding nor appreciation of Darwin. An interesting essay on this can be found Visit here, which also includes some telling passages from Nietzsche's published work, e.g. (from Der Wille zur Macht:
Anti Darwin.- What surprises me most on making a general survey of the great destinies of man, is that I invariably see the reverse of what today Darwin and his school sees or will persist in seeing: selection in favour of the stronger, the better constituted, and the progress of the species. Precisely the reverse of this stares one in the face: the suppression of the lucky cases, the uselessness of the more highly constituted types, the inevitable mastery of the mediocre, and even of those who are below mediocrity. Unless we are shown some reason why man is an exception among living creatures, I incline to the view that Darwin's school is everywhere at fault.
Unless, by "influence/inspired", you mean that much of what Nietzsche wrote was antithetical to Darwin?
The later use (Nietzsche died in 1900) by Hitler's National Socialists was in fact a massive exercise in quote-mining--an exercise encouraged by Nietzsche's sister, who married a prominent anti-semite. Nietzsche, with his many faults, was not a proto-Nazi; the Nazis had to ignore/expunge huge portions of his works, in which he descried, inter alia, German nationalism.
Why the antagonism toward God and those who follow Him?
I see by your post and by your tag that faulty analogies are your stock in trade.
Supporting science against willful ignorance is the most reverence for God (and those who follow Him) that one can have: respect for the human ability to think, one of God's greatest gifts.