In my opinion, yes.
It would be great if Clinton, Obama, DiBlasio, etc. could say:
"1: Yes, we recognize it's another, foreign-born, Muslim terrorist. Same with the MN stabber. We aren't going to insult your intelligence by pretending it's not a trend; but...
2: It's important to remember that nearly all of these immigrants (Muslim or otherwise) want the same thing all Americans want: a better life, better jobs, a peaceful place to raise their families, etc.
3: We need to do a better job screening certain immigrants (and yes, that means from certain countries), and we need to do a better job integrating them, so we avoid radicalization."
The first step is: admit there is a problem.