A source close to the matter told The Sun: “It’s frustrating to see Brad being painted as some kind of ”bad person’; when it’s far from the truth.”

It was also claimed that Brad has “great respect” for all of his children, and is maintaining a “dignified silence” where Pax’s unearthed post is concerned.

New reports in OK! Magazine now claim that Pitt’s ex-wife Jennifer Anniston has been his “rock of support” this past week.

A source is said to have told OK!: “Her first thought was how upset he must be. To be attacked in that way by someone he cares about so dearly will have been heartbreaking for him.”

The source continued: “A lot of people assume they don’t talk as their break-up was so fraught, but they have been in touch for years and she has always been a rock of support.

“They have become good friends despite all the heartache. Jen cares deeply about Brad and vice versa.”

Pitt and his former partner, actress Angelina Jolie, are parents to six children: 22-year-old Maddox, 19-year-old Pax, 18-year-old Zahara, 17-year-old Shiloh, and 15-year-old twins Knox and Vivienne.

Aniston, meanwhile, is still grieving the recent loss of former Friends co-star Matthew Perry. The pair remained close friends after the show’s culmination in 2004, and the suddenness of Perry’s death is said to have knocked Aniston off her feet.

What do you think about Pax’s Instagram post regarding Brad Pitt?