I noticed having negative thoughts and emotional problems when I used any kind of chelator. I didn't really have especially violent thoughts though.
You might want to consider the way you are chelating. You may be using too much cilantro. I took 3-4 dashes of the spice every 3-4 hours, including at night. I wouldn't do much more than that. Remember that cilantro is a potentially dangerous chelator and using it too much or unsystematically could be hazardous.
I used a Japanese chlorella, which came in small tablets. I took about 6-10 of those before meals, before bed and when I took the cilantro at 4AM.