Yes, by definition of making any truth claim, I am saying that millions of people who disagree with said truth claim are wrong. Those who disagree with me are also claiming that I and the millions of other people who would agree with me are also wrong. That’s implicit in claiming to be right about anything.

Like you, I also see (and stated in my article) the value that science has brought to society and the mistakes that organized Christianity have made when dealing with science, largely due to interpretive issues. The point is that science can provide answers when dealing with the physical universe but cannot provide answers to metaphysical questions because it is inherently limited.

As a side note, it’s important to remember that the blunders of organized Christianity throughout history (such as the Inquisition, etc.) were all contrary to Christianity’s teachings. It’s important to not discredit the beliefs of Christianity simply because people have used or abused those beliefs for their own ends. Also, Hitler, though baptized a Catholic to appease his mother when he was young, was not a Catholic in his beliefs at all. There is a wide consensus among historians and biographers of Hitler regarding this. Though he would sometimes make pro-Christian statements or appearances for political gain, if you read his writings, you will find that he was very anti-religious, heavily influenced by atheist writers such as Nietzsche.

Science may not always be right but that can be said about religion as well. Even Christianity has made several blunders. Remember the dark ages? The Spanish inquisition? Wasn’t Hitler a Catholic?
Isn’t the problem not in the “scripture” but in the interpretation?