And I'm sure you will accept Hamas strikes against Israel as justified as long as they deem the IDF as a terrorist organization? Or is it only your view of who is or is not a terrorist organization that matters?
We should never let labels like "terrorist" be used to justify using any means neccassary to ensure their removal. There is always the null option - do nothing. How much civilian casualties are there with that option vs. indescriminate eradication of anyone near Hamas?