Nothing stings like being called a “fanatic” or anything of the sort, or that is what I think. I was recently called a “fanatic” by somebody I personally know over the issue of people skipping Mass; needless to say I was accused of being judgmental as well. I proceeded to explain the difference between judgmentalism and Christian evangelization, but with the same person I have explained this to several times in the past.
Jesus Christ Himself commanded us to judge by acts, not by appearance or persona. “Stop judging by appearances, but judge justly” He said (John 4:27). It is wrong for example to call people names, attack somebody even over a legitimate issue and take joy out of it, or to condemn them to Hell; that is judgmentalism. This is what Christ commands us not to do. Christianity wouldn’t get to being where it is as a global religion if all its members kept their faith to themselves as many want us to do. Christ commanded us to make disciples of all nations (cf. Matthew 28:19); this naturally means also to tell people what is right and what is wrong. It’s not about putting on a “holier than thou” attitude; that’s a straw man used by people who are lacking in faith and works.
This same person likes to preach “judge not” but the same person calls others “whore” or “slut”, cusses others out for not believing or practicing what they themselves do, and criticizes others for not being as clean or tidy as them with their belongings. They say those who call out sin are “judgmental fanatics” but they themselves are not in their minds. This is truly judgmentalism as Christ condemned and it is also hypocrisy, not to mention worldliness for putting worldly things before spiritual things. Martha was cleaning the house while Saint Mary listened to Christ; Martha then complained and Jesus told her she is “anxious and worried about many things” but “Mary has chosen the better part and it will not be taken from her” (cf. Luke 10:41-42).
In the end it comes to stubbornness or lack of humility to accept we do not determine our own truths but God does and He does through His Church in the Magisterium, Sacred Tradition and Sacred Scripture. If they want to have Catholicism however they want, there’s already a church for that: it’s the Episcopal Church (U.S.A.).