Disproportionate punishment

Parshas Hashavua בלק Mori V'Rabi Harav Hagaon R.Shlomo Miller Shlita said, In  Parshas לך לך Hashem said," ואברכה מברכיך ומקללך אאר I will bless those who bless you  and  those who curse you, I will curse".   ארה לי- CURSE ME בלק was aware of this, yet he still insisted on having the  Bnei Yisrael cursed, even though as a result of this,  בלק himself will be cursed.  The שונאי ישראל attempt to harm the Yidden even when  they know they are harming themselves & will lose out by doing so. The שונאי ישראל ימ"ש are aware that every time they attack  the Yidden the Israeli army, incurs disproportionately way more punishment on them, yet they keep on  repeating their attacks  because their שנאת ישראל overrides any logic.