This is Israeli Muslim Arab Hamzi Abu Hatab, he had the following to say:
"I am Hamzi Abu Hatab, I was born a Muslim Arab and proud of it. I stand behind my words and I am not afraid to publish this post everywhere to strongly condemn all the damn murderous terrorists who harm innocents. I wish them 100 times more the same back to all their families. I am willing to stand by Israel and avenge the blood of the innocent.
I have a business of electricity & air conditioning and because of the situation I decided to work at no cost, all at my expense, for the next week for all the families of the murdered.
I wish we will not know such days anymore, only peace and brotherhood. I am not afraid of this long journey."
Source: Documenting Israel - Telegram