You sound a lot like me, I'm empathetic to the point of feeling other people's anger. Since I'm a new convert I'm still working to integrate that with the church. Anyway, it sounds like you took on some of their anger. Personally, I need time to myself to process when that happens. Sometimes I'll take a warm bath to relax myself, then lie down and just let myself open up and pray. I'll ask God to help me get rid of it. Since I'm new around these here parts, I've only been to the temple once and didn't have my recommend yet but I agree, going to the grounds was enough. I sat out there (it was freezing btw!) and closed my eyes and just soaked it in. I actually started to cry about something I was upset about and never in my life have I had this happen but my tears just suddenly dried up and the thing I was upset about was just gone *poof*.
I can't let myself get too deep with the anger on the internet. I feel it way too easily. Boy, the things people have to say about the church, yikes! I read a little because I want to keep up with public perception so I'll know what people need to be educated on but I can only handle a little bit at a time.
If I leave a review about something I don't usually keep up with comments and I've got my safe areas where I know folks aren't going to lash out. Gah! Protect yourself.