they did pass the law through the lower house. the upper house can demand amendments and stall things a bit, but it can also just be completely ignored given enough time.
> despite the obvious objection that message filtering is impossible
it's not impossible, it's just a horrificly bad idea, and why would being impossible affect if it gets passed or not?
> by saying "we know it's impossible but we would like to have the legal right to do it in case it becomes possible in the future"?
no, they issued a press statement saying they won't implement the thing they passed until it's "practical".
lots of governments pass lots of laws and regulations and are untruthful about what they'll do later.