Can a World War 2 motar destroy a M1 Abrams?

No. WWII mortars could not even destroy WWII tanks.

The US had 60mm and 81mm mortars in its frontline units. There were Excellent against machine gun nests and troops in foxholes. But the best US mortar was the 4.2 inch "chemical" mortar. The US had about 25 battalions of these, and they were distributed around by companies. This was a much larger weapon than the 81mm mortar, designed to fire white phosphorous and smoke shells - hence the "chemical" designation. But there was also a high-explosive round for the "four deuce" mortar, and the infantry troops loved to have these guys around.

But even a 4.2 inch chemical mortar could do little harm to even the tanks of WWII. The best you could hope for would be an extremely lucky hit that would disable one of the tank's treads, maybe cause it to come off. You could never aim and hit a target like that, it would be pure luck.