something I have thought about many times. Revelation says that those numbered and killed after the millennial reign would be "as sand on a seashore.
So did I and that always worried me. And being the compassionate person that I am, I always prayed to God for them in advance hoping that maybe there is someway to help these people beforehand. I thought about this a lot and really felt sorry figuring that there must be some way to save all of them. I also was worried that I could be among these people; But I came to a realization. First, as it relates to me, my relationship with God is such that I trust him and I am not worried now what he will do to me.
Also, but as the verse you reference relates to others, take for example the people that were around with Jesus; all that Jesus did was to relieve suffering and do good things to all and to what result? -they crucify him.
Thus, patience has its limits and there comes a point where people have to be stopped. Take Satan for example -he just won't stop.
The Bible says that Satan and a lot of people will be thrown into the barbecue and that is the nature of reality and I cannot change the nature of reality. And if Satan and a lot of people come after me in the millennium, I have had enough already at this side of Armaggedon and so has everbody else. Enough already, no sentiment from me at that point in time; plead you care with God and leave me alone. What a whole bunch of people don't realize is that there is accountability, God is abundantly merciful but once someone initiates some form of attack against God's friends, He will hear their cry for help and use all His power to stop them.