There is no doubt that Palestinians launched anti personnel missile attacks on the ordinary people and children of Israel, from Gaza, in breach of the cease fire, and of international law.

You may assert that it was done without Hamas connivance, but not that it is "pretty well established."

Most people, like me, believe it had their tacit approval, if not active participation.

We know they exert tight control over tunnel imports, because they impose taxes on them.
We also know that they have never criticised or condemned a single one of the thousands of launches since signing the cease fire.
(And neither has Jim.
"Every little helps." Right Jim?)