
Yeah but most of the architecture isn’t that old. I mean that’s pretty normal, in most places you won’t have architecture dating back 2,000 or more years. Most of what we recognize as historic architecture in Jerusalem dates back to Byzantine or Islamic periods. There’s some exceptions like the western wall of course, which is primarily Herodian.
The topic of archaeology and architecture in Israel is actually a very complex and interesting topic with a lot of politics involved. Israel has a number of national parks dedicated to architecture which are primarily Palestinian villages who were expelled (Achziv, Bar‘am, Caesarea). Archaeology is also used to displace people today, as several communities in the West Bank are currently being expelled to make way for a park at Sebastia.
However for a significant period of israel’s early history, the government and military acted against historical preservation as a method of removing the historicity of Palestinians. Maybe the best example is the destruction of a prominent Shia Muslim Shrine of Husayn's Head during peacetime in 1950. Many historic Arab settlements and neighborhoods were razed, and this actually included the destruction of historic Jewish synagogues within those towns.