You have truths, half truths, and zero truths all mixed together here. She definitely was an advocate of absolutes, she was a very strong advocate of reason, but militant? If militant means anything it is the use of military force to achieve your objectives and she only believed in using force in response to the initiation of force, i.e. in self defense only. Anti Christian? Yes and no. "Do not steal" is definitely her battle cry. I don't think Christ was an advocate of theft. She definitely did not like any idea that could not be verified by the senses, an idea that required some "mystic" way of achieving said knowledge
EVERYTHING the opposite of Jesus? She liked moral absolutes ( not the moral relativism of the left). Christians have moral absolutes. She did not like all of them and most certainly not the way at which those absolutes were justified! If ALL the ideas of Christ were bad they would not have survived the test of time any more than ALL the ideas of Mohammed are bad.
I wonder if this Author includes the King of the Architects of the culture of death: namely Mohammed himself? Compared to that guy all the others are chumps.(Except maybe Stalin, Hilter or Mao who are close)
Yes, 'militant'. Ayn Rand was an atheist who condemned religion, who called the Cross 'torture', and who was not sufficient with being some quiet non-believer but someone who attacked religion. THAT is the meaning of the 'militant' atheist. There is a difference between 'militant' and 'military'.