BC, the problem is when schools switched from being institutions promoting knowledge and learning and instead turned their focus toward advancing favored social causes, usually surrounding race, class and gender issues or in this case science that is highly politicized. 

I may agree with the large majority of your political views or the views of the average school teacher, but I still don't think it is right for the schools to act as agents of social change. There are 2 main reasons: one is that many families don't share the neo-liberal progressive views espoused by teachers, and it's not right to be using families' own tax dollars to teach kids things the parents don't believe. And two: when the focus of the curriculum is toward race, class, and gender issues and using science as a political tool, there is necessarily a large body of knowledge that is left out.