Did the Mufti of Jerusalem Haj Amin al Husseini encourage Hitler to kill Jews as per hadith ?

No. The conversation that went between the Mufti and Himmler was as follows:

Himmler asked me on the occasion: “How do you propose to settle the Jewish question in your country?”

Husseini : “All we want from them is that they return to their countries of origin.“

He (Himmler) replied: “We shall never authorize their return to Germany”.

(Diaries of Haj Mohammad Amin Husseini, pp.126–127.).

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