Why are people still talking about or believing alternative theories about the JFK assassination?

[Tree Lady]

18. I am taking a senior class for fun

on looking at the Kennedy assasination. Interesting class, learning a few things. One LBJ wasn't going to be chosen to be VP on next election he was in trouble which magically went away as he became president. JFK threatened to tear the CIA into a thousand pieces and his brother went after mafia. So my personal belief is that the CIA set it up using mafia and Johnson knew about it. Dulles had no business being on Warren commission since Kennedy hated him and fired him two years before. Thats a whole other crazy thing, even though fired on day Kennedy was killed Dulles was at the farm CIA had. The more I learn and find out things, the more our whole agencies looked very corrupt back then.

We learned about Chicago also. About how security in Dallas which with all the threats should have been more was less. They used less motorcycle cops and the ones used were told to be behind car instead of surrounding it as normal. Normally all windows of buildings passed would be checked and windows boarded up. It's actually pretty obvious looking at the facts that it was not a normal event set up.