So a single tree can smash a large aircraft into a million pieces scattered over a square kilometre....?
No, but hitting the ground at an inverted angle at 250km/h tends to cause considerable damage to planes. Incidentally, it wasn't all broken into a million pieces, as can be seen from pictures taken at the crash site.
What was the altitude of the plane when it hit this imaginary tree? 10m?
If you'd actually read the crash report, you'd know that the plane was trying to climb out of a ravine at the time of hitting the tree. It was barely above ground, and it took a matter of seconds for it to crash. One of the key causes of the crash was that the crew were unprepared for the specifics of the runway, especially the ravine before the touchdown zone.
Now, look at this crash, which also featured a TU-154M crashing on approach. aviation-accidents.net/vnukovo-airlines-tupolev-tu-154m-ra-85621-flight-vko2801/ - look, what a surprise! The plane is destroyed as a result of CFIT, just as what happened in Smolensk!
I'm amused that you know so much about the crash, yet you're too spineless to actually make a report to the public prosecutors about the knowledge that you have.
By the way, do tell us in which fantasy land a plane can hit something like this just a couple of metres above the ground - pl.wikipedia.org/wiki/Brzoza_smole%C5%84ska#/media/File:Tree_of_Polish_Air_Force_Tu-154_crash_(MAK_report).jpg - and survive? A tree trunk of 30-40cm diameter is going to do damage, especially at a speed of 250km/h.