Brian Austin Green may be seeing a tinge of red.

Just days after slamming a claim that accused ex Megan Fox—with whom he shares sons Noah, 10, Bodhi, 9, and Journey, 6—of making their kids wear girls' clothing, the 49-year-old has responded to an Instagram user calling him a bad father.

People like this have lost their minds, the Beverly Hills, 90210 alum—who also shares son Kassius, 21, with ex Vanessa Marcil and 11-month-old Zane with girlfriend Sharna Burgess—wrote in a June 15 Instagram Story post. Why anyone thinks it's morally okay to attack people like this that they have never even met is crazy.

But his message extends far beyond one criticism.

Let's do better as a society, he added. We owe it to the future generations.

Green's statement comes five days after he publicly came to the defense of the Jennifer's Body star after a former congressional candidate alleged that she forces their sons to wear girls clothes, calling it child abuse.

It's a totally bogus story, Green told TMZ June 10. There are only a few people in their world that can actually verify wether [sic] or not a story like this is true and I can tell you with absolute certainty it is not.