The OP has linked to a media source where the people protesting were interviewed and calmly stated their concerns, the counter protesters were given an opportunity to speak but...well the footage speaks for itself. You have posted links which describe those parents as invaders but gives little detail about the specifics of their concerns which proves part of my point.
I do not need to know or agree with the politics of Gript to listen to the voices of those parents. My political views have not been packaged as an ideology and delivered to me, I prefer to assess every argument on its merits and evidence.
If you are unaware of the larger discussion about RSE materials and safeguarding then perhaps you should find out a bit more before accusing people of being disingenuous.