Ed. Gutierrez is upset because the truth about the creation and development of mathematics happens to be the truth about the creation and development of mathematics. And worst of all, people might discover that truth before the left can effectively re-write history or successfully threaten those who would dare point it out.
So beware of giving credit where credit is due. After all, "all knowledge is relative;" that is, leftist whack-jobs like Gutierrez should get to decide what's important and who gets the credit.