If male people think that it is merely protesting when they enter a female single sex provision that they are excluded from, then I suggest that they inform themselves of what the law supports which is safeguarding. Safeguarding is also based on consent.
When a male person enters a female single sex provision when they know that they are excluded, it violates consent and safeguarding principles.
There is no excuse or philosophising that can frame that conscious and deliberate violation of consent and safeguarding principles as anything other than a predatory act.