I don't believe they try to be hurtful on purpose, I think they are just so full blown into their selfishness that they will take down anyone in their path, anyone that attempts to stand in their way. I would not take any of it personally but it is very hard to detach, be objective, and continue to love from a distance. It's a tough balancing act for sure.
I think those individuals that rush to D already have a landing pad and have secured OM. My XW was pretty tight lipped while we were married but soon after the D was final I found out about OM and just the timeline alone tells me that they met while we were separated but still married. It also told me that she had been dating probably within 2 to 3 weeks after moving out of our house. I firmly believe she did not press forward with D until she found a man and was comfortable with him.