My thoughts:
1. They claim Christendom Apostatized itself from true Christianity by the 3rd Century , yet they accept Apostate Christendoms determination of what books are to be included in the Bible as Gods word as if they were governed by Holy Spirit to do so.?
The canon of the Hebrew scriptures was fixed even before Jesus' was born. and the New Testament books were finalized by 180 CE (the Muratorian Fragment),. So the JW's believe that the canon was determined much before the Councils of the third century Roman Catholic Church.
2.Jehovah`s Witnesses have only ever followed in Christendoms Missionaries footsteps where they have gone preaching and poaching off of the work these missionaries that have laid the groundwork before them .
The problem is the starting point. Christendom had 1500 years to them before JW's started. Any religion or sect or cult that started in the 1800's had the same problem. There was vrtually no place where Christendom had not reached.
On another note, most of the Christendom history of the dark ages is filled with bloodshed, violence, inquisition, and crusades. So I would not say that JW's or any other cult followed their footsteps. And the fact that many people join these cults is that that previous religion did not do a good job in retaining them. And that's the business model of a religion. Even Jesus converted Jews to Christianity. that's how religions grow.
4. The average rank & file JW likes to think that Jehovah`s Witnesses are the only ones that use the name Jehovah.Little do they realise that not only the Bible they use was established by the Catholic Church but also the name of God Jehovah was also. By a Spanish Catholic Monk in the 13th Century by adding vowels to the four letters of Hebrew {Tetragrammaton} translated by him as JHVH and coming up with the name Jehovah.
It seems that the name Jehovah had come up even before the Catholic usage in the 13th Century. Following is the comment made in the part "Jehovah" in the Catholic Encyclopedia:
the word is found even in the "Pugio fidei" of Raymund Martin, a work written about 1270 (ed. Paris, 1651, pt. III, dist. ii, cap. iii, p. 448, and Note, p. 745). Probably the introduction of the name Jehovah antedates even R. Martin.
https://www.catholic.org/encyclopedia/view.php?id=6291
5.The Catholic Church and Christendoms Protestant religions have been using that name ever since the 13th Century in writings ,engraved on Churches and with biblical scholars throughout the world down to this day.
And that is what irks me. If you can use the name on buildings and other writings, why did you remove it from the Bible?? Only 1 or 2 instances in some of the authorized Bibles?? The name of God was to be used in worship. There is no point in having the names high up on buildings and in scholarly and academic writings, but removing it from the Bible, which was the primary tool for worship for the common masses. If Jehovah was not the right pronunciation of the name, then why use Jesus, Joshua, Jeremiah, etc? Since they are also not the way Hebrews pronounced them.