One of the things Trump has been correct about is immigration. We should suspend all immigration from Muslim countries. The shooter was born in the USA, but I don't believe the mosques in the USA would be so radicalized if it weren't for the inflow of radical muslims and dollars from Saudia Arabia.
His parents were muslims that were admitted. That turned out very badly for the 20+ people that would be murdered by their America born son.
What about other relatives, friends/contacts of the couple? BTW the male San Bernardino shooter was a native born US citizen, too.
Rational minds will see we have a problem, and excuse makers, appeasers, will spin, spin.