"Agree that"? What are you on about? The parent comment can't remotely be interpreted to be saying this.
> ... especially when they, at the same time, "stand against" how "toxic" men are.
The term "toxic masculinity" does not imply "masculinity = toxic".
Rather, our culture associates certain (often positive) traits with what it means to "be a (real) man", such as strength, protectiveness, ambition, decisiveness, confidence, courage etc.
"Toxic masculinity" is the cancerous behavior you get when men overshoot in trying to display these qualities, such as authoritarian behavior stemming from an obsession with being perceived as strong; being incapable of letting others shine due to seeing everything as a zero-sum competition; being unreasonably stubborn and unwilling to change their mind out of a desire to be perceived as decisive and confident; pointless risk-seeking behavior potentially putting others at risk etc.