How does selling or giving weapons to other countries help make war?

and help create tensions leading to the need for more weapons orders from weapon manufacturers, leading to pressures to use those weapons to justify having them, which creates more tensions, requiring that we sell more weapons to other countries to help make them feel safer, which actually forces others to get... show more and help create tensions leading to the need for more weapons orders from weapon manufacturers, leading to pressures to use those weapons to justify having them, which creates more tensions, requiring that we sell more weapons to other countries to help make them feel safer, which actually forces others to get their own weapons, creating tensions that force us to use our weapons, which requires more orders for newer weapons, etc....?
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