Surely we can put our differences behind us, when it comes to create space lasers that protect us from a humanity-on-the-rocks scenario? Or at least send a pro

Surely we can put our differences behind us, when it comes to create space lasers that protect us from a humanity-on-the-rocks scenario? Or at least send a probe out,which proves that vital defense can be used for offense and to solve the Fermi-Paradoxon.