Yup its true , a group under name bitpico is behind this. they claim to control 30% hashing power
https://news.bitcoin.com/bitpico-claims-segwit2x-still-alive-despite-evidence-contrary/
https://www.cryptocoinsnews.com/mysterious-group-bitpico-threatens-to-execute-segwit2x-hard-fork/
Craziest thing in what you wrote is that they 'claim' and people are actually still scared. You'd think that just saying that someone is making such a BS statement like that would toss up some red flags. I could also claim I own a million Bitcoins and that I'm just chilling here, good thing that's just a CLAIM.
B2X is dead, this is some BS by people who are trying to drive up the futures on HitBtc. So Rest in Peace futures buying on hitbtc, sucks to suck.