Technically can any attack be lone wolf? While the attack may/may not be coordinated but he was radicalized enough to do this. This radicalisation took place either online or offline. In either case there must be some platform/individuals involved who brainwashed this man to carry out a suicide attack .
Hopefully the NSL will find out.
Yes. Attacks can be lone wolf. In reality, most attacks are lone wolf.
Self radicalization is a thing. Some communities are a cesspool - a different reality altogether. You aren't coerced to do it - you partake in self-radicalization together with a community. The community may not ask or coerce you into it ( because that usually doesn't work.) You have to decide to do it yourself.
Then you SNAP! It depends on your personal circumstances and the point you are in life. Usually, very depressed people with little to live for and have suicidal tendencies partake in these lone wolf attacks.
Let's put that into perspective here - HK youths are living in cramped rooms. Most of them are very active online and they get radicalized in these chat rooms or communities. The fact that anti-establishment is celebrated as "heroic" gives them the extra vigor and impetus.
One good mundane Saturday a message arrives in the chat group -
" Guys, grab some popcorns. I am planning to throw a surprise for you all!"
Seriously, haven't you guys seen the Jachie Chan flick - New Police Story?