Too little, too late.

I'd go back in time with a sniper rifle, some sandbags, three white phosphorus grenades, and a bag lunch; wait for Abraham to show up a mile away on the hilltop to sacrifice his own son, and pop them both with headshots.

Then, approach on foot, dagger to the brainstem for both father and son, and finish the day off by eating the bag lunch prior to heading to their family compound to wipe out the rest of their fucking tribe by tossing the wp grenades into their tents and shooting any of the women an children who made it out alive.

Bang: No Jews, no Christians, and no Muslims.

Have a nice day.