Can you help in finding a book by an Islamic scholar that scientifically refutes communists, to discuss with those who follow this methodology?

There are many useful books and references for discussing the ideas of atheists and contemporary ideologies, including the books of Abdul Rahman Hassan Habannakah Al-Maydani: "A Struggle with Atheists to the Bone" (الصراع مع الملاحدة حتى العظم), "The Red Plot" (الكيد الأحمر), and "Exposers of Falsities in Contemporary Intellectual Ideologies" (كواشف زيوف في المذاهب الفكرية المعاصرة), and the books of Sheikh Abdul Majeed Al-Zindani.

In addition to references such as: "The Red Cancer" (السرطان الأحمر) by Abdullah Azzam, "Communism and Communists in the Balance of Islam" (الشيوعية والشيوعيون في ميزان الإسلام) by Abdul Jalil Shalaby, "The Greater Mirage" (السراب الأكبر) by Usamah Abdullah Al-Khayyat, "Contemporary Ideologies and Islam's Stance on Them" (المذاهب المعاصرة وموقف الإسلام منها) by Abdul Rahman Umayrah, and "Dialogue with Communists in Prison Cells" (حوار مع الشيوعيين في أقبية السجون) by Abdul Halim Khafagi.

One can also benefit from fatwas regarding Darwin's theory. It should be noted that discussing those with deviant ideas should only be undertaken by someone who has a firm grounding in the knowledge of the Qur'an and Sunnah.