There's lots of options. For example you could express your willingness to let them come to America as refugees and reject xenophobic politicians who lie to you about the extent to which their families present a threat to your safety.
Unfortunately it is too late for the second half of this, but anyone who is interested can make donations
here or
here or
here. And of course you can favor policies to welcome refugees to our great country in the future, and the politicians who support those policies.