The explicit aim is to prevent all private or religious schools from teaching any religious doctrine as if it were true.
Although the majority of Swedes are still baprized inthe Church of Sweden (Lutheran), God knows there are precious few Swedish Lutherans who "hold their doctrines as true" and thus threaten the serenity of the secular state. I think we can safely infer that their real target is the Muslim community, which they cannot legally repress without also repressing the Christians "equally."
The ultimate irony is that they will bring their hammer down hard on the relative handful of Swedish Pentecostals and maybe --- maybe --- Catholics (if any of them are worth repressing) and the Muslims will ignore any attempts to relativize or secularize Islam, which is typically more zealous in the children of immigrants than it was in their parents.
And by 2010 they'll have the same policy in the UK.
Truly, it's all very depressing, but not at all surprising.
If you can’t teach religious issues in religion-oriented schools where could you?