Praise be to Allaah.
It is permissible to live in a non-Muslim country on
condition that one is able to practice Islam openly and live according to
its teachings whilst being safe from fitnah (temptation). This means that
the person who lives there should be religiously committed in such a way
that will protect him from doubts and desires. See the answer to questions
no. 13363 and
Based on that, if you fear that your brother may succumb to
fitnah because he is not religiously committed, then it is not permissible
for you to help him to come to that country, because Allah says
(interpretation of the meaning):
“Help you one another in Al‑Birr and At‑Taqwa (virtue,
righteousness and piety); but do not help one another in sin and
transgression. And fear Allaah. Verily, Allaah is Severe in punishment”
If you hope that he will become righteous and that you can
help him and protect him from corruption, and there is a purpose to be
served or a harm to be warded off by bringing him to that country, then
there is nothing wrong with sponsoring him and helping him.
And Allah knows best.