I refuse to study 20th Century Swedish history or the politics of the early 1990s of the Baltic States. Mostly because I don't have to, we're dealing with shipwreck, not a Gerard Butler action movie plot.
What I have learned is that at the time of the Estonia's construction up until the day she sank there was no universal standard for the bolt system which held the bow hood in place. The system was subcontracted out to a smaller company. And those locks worked just fine up until the night of the accident.
I have a background in Marine Science, and I understand how waves behave in combination with weather, a bathymetry. Unfortunately I'm not good at physics but I'm sure it's not hard to calculate the weight of the ship (16,000 tons + cargo), the force at her bow created by sailing at her top speed of 21 knots, and combining those numbers with that of the force of impact by large waves driven by high winds. I'm pretty sure someone already did this.
Then combine all that with the fact Estonia was sailing headlong into those waves for hours and the idea that the bow hood would be knocked loose, and fall off is in no way unbelievable.
All the other crap had nothing to do with the sinking. The investigation, the unwillingness of the Swedes to recover bodies, placing the shipwreck off limits is all just a side show.