https://youtu.be/-vARYiQPgeE
Should be able to see that one..
I agree it was unnecessary and dumb of Martinez to react like that, but some are acting like he spat on him or threw a cheap shot.. Martínez interpreted that de jong wanted to intimidate him by going for that header that he was not in good position for, so he returned the favor.
Also for all the talk of argentinas celebration, Virgil also celebrated the equaliser by yelling at Lisandro Martínez while he was on the floor, i don't know why only Argentina is expected to be classy, even when the opponent isnt