"If they persecuted me, they will also persecute you. If they kept my word, they will also keep yours." John 15:20
It's a question of education. Many catholics are ignorant and/or poorly catechized. That's where you can assist them in better understanding their faith.
Many Christians are ignorant and/or poorly catechized. In fact, many Christians wouldn't know the difference between catechized and cauterized.
If education is important then religious education is critical. Yet how many Christians are willing to allow their Christian education to be taken care of 1 hour/week on Sunday mornings and occasional casual reading of Scripture? And how many Churches/denominations don't offer any more?
Shalom.