It seems to really hate profanity. `I love it` is 1% toxic. `I bloody love it.` 38%; `I fking love it` 95%. In many circles, the more profane are more congratulatory.
Even when used positively, hyperbolic words like profanity indicate a level of close-minded passion about one side or another of a discussion. The purpose of Perspective seems to be to foster rational discussion between open-minded individuals in a comment string. I'd be hard-pressed to find someone who moved a conversation in a non-toxic direction by typing "I bloody respect your opinion, but here's why assumption X is wrong."
The implicit assumption you are making is that a comment can contain only one thing. Something like the following would be both perfectly acceptable and moving the conversation in a good direction, IMO:
So fucking awesome.
By the way, how do you do X? Whenever I've tried I always run into problem Y. Also, I'm interested in your thoughts on Z.
The initial congratulatory statement used profanity for effect and to convey emotion, but in a positive way. The following statement(s) are specifically contributing to and flushing out the conversation. 85% toxic according to them (but helpfully it did allow me to correct them, so maybe they'll get better).