Are you suggesting that the Hamas leadership in Turkey is not responsible for the actions of Hamas? Or that pinning responsibility on one person (albeit dead) is enough so there is no more need to pin responsibility on others, even if they are available?

As a single example, Khaled Mashal is in Turkey.

  > On 3 September 2024, the U.S. Department of Justice announced criminal charges
  > against Mashal for allegedly orchestrating the 7 October attack on Israel,
  > along with other senior Hamas officials.
  - https://en.wikipedia.org/wiki/Khaled_Mashal