wants
to help those who do not know the difference between acceptable
conspiracy speculation and idiotic conspiracy speculation so here goes:

ACCEPTABLE speculation: These two brothers may not have been the only
ones who did this so who or what possible Al Qaeda or home-grown sleeper
cell group helped them in planning, financing, or executing these
attacks?

IDIOTIC speculation: These two brothers were patsies.
The government was behind the Boston Marathon bombing, why did the
government do it?

Hopefully this clarification helps some…