I have found that some of the most judgmental people are those who loudly proclaim themselves to be pure and holy and that everybody else is a sinner doomed to Hell unless they follow the bloviator's extremely narrow view of Christ. In Matthew 5 Jesus labels as "hypocrites" "those who pray on street corners". And also keep in mind that there will be many false prophets before the Second Coming, those who loudly claim to be holy men but who are anything but. And IMO that doesn't just go for the guy up in front giving the sermon, but his deluded followers as well.
Linus Torvalds, the creator of the Linux operating system who later immigrated to America to work in Silicon Valley, once said that he found it extremely odd the way so many Americans are so eager to shove religion in people's faces. In Finland there's an official state church, but one's beliefs are one's personal business and are kept to oneself and one's family. In America you can walk down the main downtown corridor in any good sized city and get religious pamphlets shoved in your face and people going out of their way to "share the Gospel" with you.
Jesus told his followers to pray alone in dark rooms. The fact that so much of American Christianity is the direct opposite makes me question how true to Christ the whole mess really is.
If I'm reading between the lines correctly, it seems as if you heard people cussing in a church. I agree that that is extremely disrespectful.
It looks like perhaps you've confused "prayer" with "sharing the gospel," which are not the same thing.
Matthew 24:14
“And this gospel of the kingdom will be preached in all the world as a witness to all the nations, and then the end will come.”
Psalms 96:3 NKJV
“Declare His glory among the nations, His wonders among all peoples.”
Mark 16:15 NKJV
“And He said to them, ‘Go into all the world and preach the gospel to every creature.'”
Matthew 28:19-20 NKJV
“Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all things that I have commanded you; and lo, I am with you always, even to the end of the age.”
Give praise to the Lord, proclaim His name; make known among the nations what He has done (Psalm 105:1, New International Version).
2. Philemon 1:6 and I pray that the sharing of your faith may become effective for the full knowledge of every good thing that is in us for the sake of Christ.
There's a lot more, I just got tired.