What makes you think its a guy? I'm getting super-catty vengeful vibes here.
FWIW I agree with you. Some other things I noticed:
Individual does not speak English as their first language. Says things like "pain killer medication" instead of the commonly used "pain killers" short version. Also attempts to use proper grammar/complete sentences, but falls short.
Individual refers to Erik Karlsson's wife by her name, instead of saying "your wife." Not entirely sure what that means, but it certainly pops out to me. Generally, if you've never met someone's wife, it is unusual to refer to them by name. This person went the extra step to make it very personal. This could suggest familiarity with EK. Could also be an indication that this is an obsessive stalker who is in love with EK and resents his wife.
Would be curious to see some more of the troll's tweets just to see what else I could glean from them.
Edit: I'm no FBI profiler or anything, but have received some training from the good ole DOD on scientific content analysis. Not the absolute most useful tool in the toolkit for a huminter, but frankly, it was some of the most interesting training I ever got. Highly, highly recommend any books on the subject for anyone who has a remote interest in it.