If you want Catholics to choose a religion on the basis of lived practice instead of the actual Truth of that belief system itself, then some of us would way prefer either the Amish or the Chasidic Jews -- both of whom practice modesty universally. They are both far more palatable as belief systems than Islam is.
Technically speaking, nothing stops a Catholic family from the separatism and near-separatism practiced by the Amish and the Chasidic Jews, respectively. However, with the exception of contemplative orders, traditional Catholicism has never recommended formal separatism as a means of preserving virtues such as modesty and other forms of temperance and self-control. Instead, the Catholic has always been commanded by the Church to live in the world but be not of it. It is not that Catholicism itself is a weak religion; it is that the majority of her practitioners are weak, given that they are indeed of the world. Catholic laypeople have weak, ineffective, leaders who are lukewarm and ambivalent about the faith. That does not justify syncretism, apostasy, religious experimentation, or false ecumenism on the part of Catholic laypeople. We cannot control how all or even most Catholics behave; we can only manage our own families and then associate with other Catholics who share our priorities.
