The Katyusha and Grad rockets don’t have the range to reach Jerusalem. They are rumored to have weapons that exceed that range. Anything striking TDOTR would be blamed on Israel, anyway.
My idea is that sometimes the best response to a illogical or irrational attack is NOT a “measured”, “proportional” counter-attack.
I believe there must be enough HAMAS missle fragments lying around to permit someone to “reconstruct” a missle that would function.
Would that missle be a HAMAS missle? Yes, absolutely.
Where was that missle’s launch-site? It was a HAMAS-produced barrage, so NO ONE KNOWS.