Because we are proud and full of joy to be part of the Church that Jesus established. And we also want others to convert to His Church and be ONE with us like He commanded.
Gathering people into His Church is being EXTREMELY focused on Jesus.
I am a member of the Church, just not the one you attend. Again, why all the focus on affiliation rather than Jesus?
Truth completes us. Oh, how I wish their spirits were calm enough to hear, if they only knew... How blessed we are to be Catholic!!!