What makes the video claim the 'Out of India' theory is more of a political agenda than a scientific one? Can you explain how higher Yamnaya ancestry in Brahmins points to steppe men becoming an elite in the caste system? The video mentions 'patriarchy on steroids' and extreme male dominance in reproduction; what kind of evidence supports this continental-scale male-led expansion? Why does the video characterize the Indo-European expansion as bringing 'darkness' to Neolithic Europe and causing the collapse of its first civilizations? How did a male-led invasion supposedly replace 90% of the previous population in Britain almost overnight to shape modern British genetics?