How the Ummah went wrong

Many have been educated one side of Islamic history for generations when it came to the issue of Muslims fighting each other. These days Muslims are ready to point fingers, call each other kufr and even give fatwas to kill each other. If you know the story of the first four Khalifah's you will see that they would rather die themselves before lifting a sword against a Muslim even if those Muslims are coming to kill the Khalifah. These days the Muslims are not even close to the iman of the Khalifah and have the stubbornness to feel that they are the right sect and everyone else is wrong. Instead of being faul mouth and suspicious always, why not spend your time doing Dawah and not splitting the ummah more and more each day. Shame on many Muslims who even support Dictators just so that their sects can be in power.