The words god and ki cause a lot of response...people get emotional and defensive when the words god and ki are used.
People get defensive because of fear. Written "holy" texts pertaining to God, most significantly the Bible and Koran, teach to love and fear God. In the movie Donnie Darko, Patrick Swayze's character speaks of fear and love as being polar opposites. Even though Jake's character disagrees and is "cool" for doing so, they in fact absolutely cannot coexist. Even after reading the entire NKJV Bible and Koran, I found myself left as a stranger to God. What we do not understand, we fear, out of one of the most basic human instincts - survival. Ki is mysterious as well, although I believe some have attained knowledge of its essence. Most people, on the other hand, who have heard of ki, fear it. It is pure fear of the unknown that results in "people get[ting] emotional and defensive when the words of god and ki are used."
For a fresh image of God, There should be no Aikidoka whom hasn't read Saotome's "Aikido and the Harmony of Nature." This ultimate wealth of Aikido knowledge as well as general wisdom just shouldn't pass anyone by.