I can only say what I’ve seen from the past. All the rocket attacks have been directed at leadership or operatives in the field who are actively attacking (like launching rockets or mortars). I’ve never seen an entire family attacked by rocket.
In terms of demolition of homes ... an entire family’s home can be demolished, but they will always get the people out of the house. And they won’t be demolishing a whole series of homes for an extended family, but only the one associated with the terrorist.
They won’t harm the rest of the family, but they will arrest the terrorist.
This is from all I’ve seen.
Then in my opinion Israel is committing suicide. Where is the lesson to be learned when I raise my kids to be terrorists and you only arrest me? What have my kids or other parents learned? Raise your kids to be terrorists and you may get put in jail for a few months.