You've missed the point, there is no objective measure of a troll. If you strongly believe A and think nobody could believe B in good faith, and I strongly believe B and think nobody could believe A in good faith, then you are a troll to me and I am a troll to you.
Go on a forum with lots of republicans and argue standard democratic talking points; they'll call you a troll. Do the inverse and they'll call you a troll. People use the label of "troll" against people who are being earnest when they say something the listener strongly disagrees with. It's little more than a generic insult for people you disagree with, like "idiot".
In the example you give, the people calling politicians satanic probably earnestly believe that in many if not most cases. You might think that nobody could have that point of view in good faith, but this is a country with many millions of Christians who earnestly believe all kinds of wacky nonsense. I know Christians who think Halloween is a satanic holiday. They're not trolling, they really do believe that. You say that people who accuse politicians of satanism are trolls because you strongly disagree with what they're saying and you think they don't have a rational reason to believe what they say (which is probably true) but you don't have any evidence that they're misrepresenting their true beliefs to get a rise out of you (which would be "true trolling".) If they really do believe what they say, then they're not trolls. Even if what they believe is totally irrational, that's the way some people are.
If the problem is a small number of people dominating the conversation by leaving 100x more comments than anybody else, then solve that problem by requiring commenters to identify themselves and rate limiting people. This doesn't require you to read their minds to determine their true intent.