Can you point me to where this is being said?
Even on this thread! there are Russian trolls bloviating about the apartment building supposedly being next to a military facility, as well as Putinistas on plenty of threads justifying blowing up hospitals and apartment buildings because (probably in their fevered fascist minds, but even if they are right) defenders against the attackers were in there.
No shortage of people, unfortunately, who don’t see every single bit of death and destruction and entirely the fault of Putin and Russia.