I have more concern for those who remain indifferent than those who are passionate but wrong or incomplete in their faith. We are all to varying degrees earthen vessels. Even the most pious among us are on a life long conversion to holiness and all will fall short. I really believe that those who spend so much of their time in the Religion Forum, even if to abuse the Church and Catholics, are responding to a call from God that puts them in a place to be exposed to His truth. We who believe have a similar call to evangelize and forgive.
“I have not come to call the righteous but sinners to repentance.” - Luke 5:32
What do you do when the indifferent are indifferent to YOUR concerns? One can only pray for them. Forcing yourself on them or nagging won't break the walls their indifference.