Meaning of Dream

I just had the strangest dream in my life. I was murdered or killed.

The story goes like, it begins in a church. I don't know how I got there but I didn't put myself there. The dream put me there. 

I was there standing, and to my surprise I saw my ex-girlfriend and my girlfriend there with me. It is kinda blur at this part but all I did was trying to get out of it like as if I could not take it to be there. So I took them out as well. 

The next thing happened was I and my brother were sent to a big ship. I went into the ship to assassinate a guy who looks like Hitler. After sneaking and stuff, we were in this spiral ladder and Hitler showed up. Ridiculously, I chose to throw away the gun before Hitler sees me so that I can reason with him that I was there not to kill him. Apparently he was not interested in any talking, anyone who dares to sneak into his ship is dead. He then shot my brother first and then me. 

Strange, but I swear it scared the fuck out of me. I dreamt a lot, but this one is the true nightmare.

The part when I was shot, It just went pitch black. A complete darkness and all I did was thinking whether I was really dead or not. I could not get out even I tried, trapped in a dark. It feels like hours, I tried to wake myself up but I just could not. I felt miserable, and I regret for not saving my brother. "If only I dared to stand and just shoot Hitler instead of giving excuses."

So then, after I woke up. I cant fucking get rid of the dream. I even barely remember what happened but I know I was killed in the dream. Then I googled "Dream of being killed means"

Here is what I found:

To dream that you have been killed suggests that your actions are disconnected from your emotions and conscience. The dream refers to drastic changes that you are trying to make. There is a characteristic that you want to get rid of or a habit that you want to end within yourself. Killing represents the killing off of the old parts and old habits. Alternatively, the dream represents feelings of being let down or betrayed by someone in your waking life. You are feeling overwhelmed, shocked and disappointed.

This shit has a strong message.