Further, your comparison of a collision with a line backer or a 4yo is faulty. A more apt comparison would be a fly against a line backer or a fly against a 4yo. It’s really the same.

My whole point is to make an apples to apples comparison you need to know two things.

A. the force involved (Mass x speed of the moving thing) B. Are the structures comparable. (how the non moving thing responds)

It’s really the same.

It's not the same, because it your example, a fly, you are have an incredibly small force.

EDIT I see you didn't make the point about the bombs. JonathanE did.

You did not watch the video, you do not know what plane hit the building (b25 bomber) but tell me my comparison is faulty,

A B25 bomber does not equal there were bombs on that plane. Why would a B25 have live bombs on it flying over NYC?

Looking it up https://en.wikipedia.org/wiki/1945_Empire_State_Building_B-25_crash

there's no mention it did have bombs.

On Saturday, July 28, 1945, Lieutenant Colonel William Franklin Smith Jr., of Watertown, Massachusetts, was piloting a B-25 Mitchell bomber **on a routine personnel transport mission **from Bedford Army Air Field in Massachusetts to Newark Metropolitan Airport in New Jersey.

Further, your comparison of a collision with a line backer or a 4yo is faulty. A more apt comparison would be a fly against a line backer or a fly against a 4yo. It’s really the same.

My whole point is to make an apples to apples comparison you need to know two things.

A. the force involved (Mass x speed of the moving thing) B. Are the structures comparable. (how the non moving thing responds)

You did not watch the video, you do not know what plane hit the building (b25 bomber) but tell me my comparison is faulty,

A B25 bomber does not equal there were bombs on that plane. Why would a B25 have live bombs on it flying over NYC?

Looking it up https://en.wikipedia.org/wiki/1945_Empire_State_Building_B-25_crash

there's no mention it did have bombs.

On Saturday, July 28, 1945, Lieutenant Colonel William Franklin Smith Jr., of Watertown, Massachusetts, was piloting a B-25 Mitchell bomber **on a routine personnel transport mission **from Bedford Army Air Field in Massachusetts to Newark Metropolitan Airport in New Jersey.