Historically the democrat party has been the party of extremist views. FDR appointed a former KKK member to the Supreme Court who wrote the majority opinion that created the concept of Separation of Church and state which had no basis in the Constitution. Democrats expanded the concept to the point of trying to destroy public displays of Christian belief. Abortion on demand was a democrat invention. Liberal Justices cited a "right to privacy" that did not exist in the Constitution in Roe v Wade. Who could forget LBJ's "Great Society" that tore black families apart? Every military conflict in the bloody 20th century started during a democrat administration. Truman ordered Troops to Korea under an illegal Executive Order and LBJ sent Troops to Vietnam under a faked "crisis. Both conflicts were criminally mismanaged by democrat administrations. JFK illegally ordered the CIA to invade a sovereign nation, Cuba, and then screwed it up. Bill Clinton ordered American planes to bomb Yugoslavia when he was literally caught with his pants down. Barry Hussein could have been indicted for manslaughter after he authorized thousands of weapons to be shipped to Mexican drug cartels and one of them turned up in the murder of a Border Patrol Officer. The bottom line is that the democrat party would have been laughed out of Washington if it wasn't for the support of the mainstream media.
The Cuba fiasco reality is a bit different from what you say.
The CIA planned the whole operation and WANTED it to fail so that they could, they believed, force JFK into invading Cuba.
He refused, and that's why the CIA killed him.