It is rather obvious that current Hamas operation could not happen without Russian - and Iranian - support. Iron Dome did not stop rockets - we do not know exact reason, but it's electronic warfare or sabotage. Same for Israel's intelligence being completely blindsided. There is no actor around but Russia, able to cause that. Obviously, the whole operation is intended to divert whatever funds USA have to spend from Ukraine to Israel.

If Israel, directly and through its lobbies in the U.S. and Europe, had supported Ukraine with arms and money, without delaying or limiting aid, today the war would be over, Putin would probably be removed from power, and Russia would have enough domestic problems to not be concerned with the Middle East.

Most probably - it is called "defense saturation". There are claims that since the attack there were up to 2500-5000 rockets launched.
Having them procured, delivered, prepared and fired within 24-hours, all in tiny Gaza strip - closely guarded by Mossad and IDF - is an enormous logistic operation (let alone couterintelligence involved)
As for Russian involvement, we will have hard-ish evidences much later, if at all, but I still claim my dedution is sound.

(Unless we believe Hunter Biden did it - yes, there was also such post...)