I imagine the situation was well-known... by all the parties to whom the matter actually pertains.<quoted text>
Learn how to read dipshit. They were listed on the historical registry in 1976. They have not been in danger since 1976. It was just recently that there was a threat which was not publicized so they were tore down before anyone knew what was going on.
We're talking about privately owned buildings, on privately owned property; these were not state or federally owned landmarks or parks or anything other than structures some group or other certified as being old.
And if the ownership of a property/properties changed, or the original/new owner decided to do something else with it that was/is within the property's/properties' zoning restrictions, then it is of exactly zero legal or fiscal concern to anyone else other than the rightful owner.
This is not some Socialist "Everything Belongs to Everybody" society where we have the absolute right to dictate what others do with what is theirs...
...at least not just yet.
So suck it up and move on. Or don't. It makes no difference at all.