Despite Ari Fuld's deadly injuries, he fought back NOT just to save himself, but to save other people from being murdered by that evil terrorist.
It seems that his courage and determination came from love.
It's an amazing act of ahavat Yisrael to pursue a terrorist while he himself suffers a fatal wound.
My husband saw Ari Fuld weekly, as Ari Fuld passed through my husband's place of work. Their relationship consisted of exchanging "Shalom-shalom!" because Ari Fuld acknowledge and greeted every Jew, even if he didn't know them. My husband said that Ari Fuld always had a smile for everyone, was a great ohev Yisrael, and whole-heartedly encouraged his fellow Jews to make aliyah.
My husband said that even without knowing him well at all, he always sensed something special and admirable about Ari Fuld, emphasizing that his ahavat Yisrael really shined through even in such brief interactions.
Some people greet you to be polite or admired, while some people greet you because they truly feel connected to you at the soul level.
Ari Fuld died al kiddush Hashem and has likely merited a very beautiful chelek in Olam Haba. May we all become fully Torah Jews, internalizing Torah principles in our heart and always listen to our yetzer hatov while blocking out the voice of our yetzer hara, and need not the death of our truly good and special individuals as a kaparah for our sins.
Saying mishnayot and Tehillim is good at this time.
There is also a fund to provide for Ari Fuld's family here (H/T Shirat Devorah):
May the fact that so much money was raised with such good will by so many caring and alacritous Jews in such a short amount of time be a zechut for Am Yisrael in our time of Judgement.