The United States' Weirdnest History

The strange sameness between former President of The United States, they are Abraham Lincoln and John F. Kennedy. I'm very curious so that I tried to find the information about them and sure enough is very strange. Could a history teacher explain it ?
Abraham Lincoln entered the Congress in 1846
John F. Kennedy entered the Congress in 1946

Abraham Lincoln elected as a President in 1860
John F. Kennedy elected as a President in 1960 

Both of them are very concerned about civil rights
Both wives lost their children while in the White House

Both of President were shot on Friday
Both of President were shot on head

Lincoln secretary name is Kennedy
Kennedy secretary name is Lincoln 

Both of them were killed by people from the southern regions
Both of them were replaced by southerners named Johnson 

Andrew Johnson replaced Lincoln, was born in 1808
Lyndon Johnson replaced Kennedy, was born in 1908

John Wilkes Booth who killed Lincoln, was born in 1839
Lee Harvey Oswald who killed Kennedy, was born in 1939

Both of the killer known by three names
Both of them name consist of 15 letters

Lincoln was shot in theater called 'Ford'
Kennedy was shot in Lincoln's car created by 'Ford'

Lincoln was shot in a theater and the killer was hiding in the shed
Kennedy was shot from a warehouse and the killer lurking in the theater

Booth and Oswald was killed before the trial

A week before Lincoln was shot, he was in Monroe, Maryland
A week before Kennedy was shot, he was with Marilyn Monroe 

See guys, it is weird, isn't it ? Let's think about it again .. lol