“You know, if you actually have a Bible...or even if you don’t [use www.biblegateway.com]...you can open up Acts 20...verses 28-31 to be specific... “
Using this verse one could come to the conclusion that the Protestant denominations are the same as LDS, and the Catholic Church is the only true church and Catholics are the only true Christians. How does that work for you?
Except the church of the first century wasn't the Roman Catholic church...Mostly 'twas Messianic Christians...and some Gentiles...God-fearers
It would be reasonable to respond to that charge, and such is often debated here. As said, truth is exclusive by nature, and thus claiming no church is the One True Church is just as much a truth claim that condemns those who differ as is claiming your church is the OTC.
Note however that the Prots contention is not that their particular church is the OTC, that being one exclusive claim, but that the OTC is the general body of Christ which one is baptized into by the Holy Spirit upon contrite faith in the risen Lord Jesus to save the damned + destitute sinner by His sinless shed blood, not because one deserved it. (1Cor. 12:13; Rm. 3:10-4:6) And thus they contend (Jude 1:3) against those who reject all churches outside theirs as being valid church and or Christians.