Yes it’s interesting to learn about other faith practices without presuming we know what they do.
Yes. One ought never presume we know what they do in their churches.
One thing on my bucket list has always been to attend a non Roman Catholic service. Finally for the first time in my life today (and I’m no spring chicken) I built up the nerve. Not because I am told God’s word is interpreted to mean I would be committing mortal sn if I didn’t.
Sigh.
It’s not a mortal sin for you to attend a non-Roman Catholic service.
Exhibit # 4322234 regarding Catholics (ex/former/not practicing/current) not knowing their faith.
You can certainly attend. But you are obligated to worship God at Mass on Sunday.
(And you cannot receive communion in non-Catholic services, although you may, with permission receive in the Orthodox liturgies. And, of course, you are always welcome to receive communion in non-Roman Catholic Masses.)
But because I’m drawn to how they serve the Lord and wanted to freely worship with them as believers in 1 God and in Christ and to learn more about them.
Of course you can. But one ought to be very, very cautious about what they preach.
Did you know that there’s pastors who believe in 1 God and in Christ but who teach some very peculiar things?
For example, here’s a church that believes that if one eats grass, it makes her closer to God.
https://encrypted-tbn3.gstatic.com/...sQ6rH0yDcj7b3YQ85hoxu2UDhgAPYXEYTEpzMZfPzY2QQ
And would you worship with this church that wants to serve the Lord and freely worship Him as believers in 1 God and in Christ? They just profess that the writings of St. Paul are satanic.
lasttrumpet.org/paul_false_apostle.htm
So, one can certainly worship with other Christians. But what they profess ought to be of great import to you.