No. That's already been refuted.
While it's true the Tsarnaev brothers were not infrequently described as "refugees" in media accounts, their resemblance to the flood of asylum seekers from Syria was passing at best. Like the Tsarnaevs, many Syrian refugees are Muslims, and many have endured seemingly endless war, death, and destruction in their homeland. The suspected attackers in Paris also had traits in common with the Dzhokhar Tsarnaev: the younger
Tsarnaev was a naturalized American citizen, and several of the identified attackers in Paris were
French nationals.
But the "refugee" question is largely
semantic in nature when applied to the Tsarnaevs, with respect to whether current refugees present a homegrown terrorist threat. Given that the Tsarnaev family arrived in the United States as vacation-goers, their tourist visas were unlikely to trigger initial asylum-seeker-type screening (to which Syrian refugees are subject). Clamping down on the admission of refugees would not affect individuals like the Tsarnaev family, who entered the U.S. with a stated intent of leisure travel.
Were the Tsarnaev Brothers 'Refugees'?
They OVERSTAYED their VISA'S they were ILLEGAL ALIENS if you are worried about semantics!