They can't even look at one another without hissing and growling, and if they can get at eachother they immediatly fight. I tried the towel thing yesterday evening. I even put one on one side of the sliding glass door, and the other on the other side, had it open an inch, and put treats in either side for them, they ate for about 15 seconds and then started. I'm going to keep them in solitary until tomorrow and try again, but I fear it won't help.
(Sorry about your cat Hello, that is the most terrible thing I've heard!)