Dreaming of killing jews;Nabi SAW;deceased grandfather

I saw a big group of Jewish people (men, women and children) that were standing in the middle of a pond on a small island. I was standing with some Afghani people who started to shoot them and kill them. They were walking towards us on the water and got onto our land, some of them died and some of them survived. Then after a while they disappeared and the Afghanis were saying takbir and celebrating their victory whilst I stood alone and was abit sad because I know in Islam it is not allowed for us to kill women and children and innocent people who do not fight us. Then the Afghanis suddenly vanished and I found myself with the prophet and his companions. the prophet told me to strangle one of the companions and not let go of him until he answers a question correctly. the question was ” who was the first person to say La illaha illa Allah?” then one of the companions said Ummar and the prophet told me to leave him, so I did (I do not remember the exact facial features of the prophet).

After a while I saw myself in a house which had my dead grandfather who was sitting on a sofa with some people I knew but he was turning left and right, his eyes were red and he did not speak. It was as if he was half dead and half alive or something in between.

Jazak Allah khair