“Withdrawing them means Iran has a green light to invade Israel”
You overestimate Iran’s capability, not their intent.
Their intent is to hit Israel with as many missiles as possible from Iran while Hezbollah does the same form the north and Hamas from the south - iron dome and the other systems will be overwhelmed. Any army that would sent kids on motor bikes to clear mine fields cannot be overestimated either by intent or capability. We’ll see as time goes on.