Antoun, Hamas is one of the political parties of Palestinian resistance and there is nothing wrong about it. Its platform is politically mature, sane and just. They have used terror as their tactic in the past - but so did Zionism to much greater scale, with much more brutality and savagery, for countless more years.
Deif is a leader with a tragic past and incredible resilience and courage.
https://english.almayadeen.net/news/politics/who-is-mohammad-deif--the-resistance-leader--bane-of--israel
Ilan Pappe can explain why Hamas is not a terrorist group. https://youtu.be/h0mY797cof8?si=26BA27ocxUQum9uo