We can applaud and support anyone doing any real good, whether they are in the Church or out of it.
The reason for this is that good is objectively good: it is good regardless of the person who is doing it.
Listen to what Vatican Council II has to say on this:
“Those also can attain to salvation who through no fault of their own do not know the Gospel
of Christ or His Church, yet sincerely seek God and moved by grace strive by their deeds to do
His will as it is known to them through the dictates of conscience. Nor does Divine Providence
deny the helps necessary for salvation to those who, without blame on their part, have not yet
arrived at an explicit knowledge of God and with His grace strive to live a good life. Whatever
good or truth is found among them is looked upon by the Church as a preparation for the Gospel.”
(Gaudium et spes 16)
