Armour vs. civilian

[m113apc]

I had this thought that I had to try out.
Israel vs. PLO, Israel attack.
I sat up a small battle, 20 x 20 map, with a platoon (3 MBT) of Merkava Mk4b against 4 platoons of civilians (rock throwing protesters).

My question was, could these rock throwing protesters knock out a Merkava, and they could.

My intention all the time was to try to make this happen.
I drove around just waiting, and they popped up or run away.
But when I had a chance, I stopped my vehicle in the middle of a crowd, waiting. And it happened. Boom, they blew me up, and killed my crew, if the crew survived.

So, my question is this.
Is this realistic?
If these civilians had a grenade, or a pistol or something, they might knock out a MBT, if the MBT was in a street, with no sight and the crew had their hatches open, but knock out a MBT with stones?

Any thoughts?