What/Who do you think caused the Boston attacks?

Why on Earth would it be an Islamic group? Even so, serious Islamic extremists normally claim responsibility almost immediately. What's more, as I said above, attacks by such extremists would have been much larger and would have included an even greater loss of life. This attack was the act of amateurs and things point to one of domestic origin.

You don't just immediately put the blame on Islamic extremists - even the Taliban for goodness' sake hasn't used the opportunity to claim responsibility. In fact, the Pakistani Taliban declared that it did not carry out the attacks or have anything to do with it. And North Korea doesn't do terrorism, especially on US soil - that's not it's "MO".

Probably another false flag by the CIA, just like 9/11.

Are you intellectually dim? Since when the the DPRK conduct terrorist attacks on American soil? By Jove, NK don't even conduct terrorist attacks on South Korean soil, let alone US soil! This isn't even NK's MO (if they even have any) - NK normally just makes lots of noise in its own neighborhood and is more concerned with nuclear issues.

If this terrorist attack was perpetrated by a state, it would have been much bigger and much more sophisticated. The Boston explosions looked like amateur acts - I don't even think it could have been Islamic extremists, unless they were really, really amateur. The pitiful amateurishness of this attack makes me suspect that it was an attack of domestic origin (freedom fighters or some other crazed fringe).

But it is certainly not North Korea - if you think so, I urge you to do us (and Darwin) all a favour...

There's never the exception to that? Islamic groups are to be almost everywhere including the US. What makes you think that there are no Islamic terrorist groups in the US? Why does it have to be the Taliban?

i am still convinced it was north korea

What does being right wing have to do with it?

If this was some far right movement in the USA such as Timothy Mcveigh - the target makes no sense.

The depravity of the chosen targets at that specific location and time, can only point to Islamists. Hitting the spectators of family members and charity runners.

Only Islamists can be that depraved.

The fact there were two maybe three bombs is another indication of it being Islamist. The fact the bombs were relatively small (I'm guessing 2kg-5kg bombs) would suggest it was either not a central Al Qaeda plot (as they would have gone for something bigger) and more likely a lone wolf or 2 to 3 man cell inspired by Al Qaeda.

It could also be Hezbollah on the order of Iran who carried out a bus bombing against Israelis in Bulgaria last year. That device was quite small too. Given the post 9/11 security in the US, some groups may have factored that it's better to slip small devices in and have more chance of being 'successful' than try to attempt a massive attack and risk being caught.

Ball bearings are also a hallmark of Islamists. 'palestinians' pack their bombs with them.

Iranian agents have been caught in several countries in the last two years planning bombings.

the internet says some saudi muslim over there on a student visa has been caught, that he was tackled after someone noticed him run immediately when the blasts went off and thought he looked suspicious.

Okay, so lets arrest every other person who was running away from the devastation. If there was a literal bloodbath right next to me, I would run.

Don't be foolish. The only way NK sees itself harming the United States is by obliterating it in a nuclear war.

Additionally, you only think it's NK because they've been in the news a lot recently - but the fact is, NK has been making outrageous threats for decades.

Lastly, please do grow a brain.