Well, spoken like a pure Catholic, I have been exposed to for nearly 40 years!!!
You said that the Catholic Church teces non-acceptance of non-Catholic Christians as Christians, and I informed you that we DO accept you That was a friendly correction, and I proved it by citing an authoritative source of Catholic doctrine. So it was friendly and accurate.
You said I was wrong, because you have never been accepted by your Catholic in-laws, whom you have lived with for 40 years. I said that your in-laws are ignoramuses: which is true, because they've somehow conveyed that their non-acceptance of you in Catholic doctrine, which it is not. They are ignorant of the truth.
Speaking, I hope, "like a pure Catholic", I have been conveying friendly (even fraternal) acceptance of YOU, and accuracy about Catholic doctrine.
Have a blessed day. I will pray for your in-laws. You might want to show them the part of the Catechism which says we are brothers and sisters in Christ.