They are Arian heretics -- they deny the Divinity of the Son and Word of God, Our Lord God and Savior Jesus Christ -- and are both pushy and deceptive in their proselytizing. We Orthodox Christians take a very dim view of the Arian heresy.
That the witnesses are Arians was news to me five decades ago. However there is a vast gulf between discussing/debating with witnesses and throwing them in jail. I've done the discussing/debating with witnesses quite a bit, learning about them to the degree that I have an almost complete collection of their hardback books from Russell to the late 1970s. Christianity has been a missionary-evangelizing faith ever since the giving of the Spirit on Pentecost. That the witnesses are heretical I agree, but their outreach is not unusual in the context of Christian history.
Think of the Press as Democratic Operatives with Bylines and it All Makes Sense - Glenn Reynolds, Instapundit blog
Democracy is the theory that the common people know what they want, and deserve to get it good and hard. - H.L. Mencken
A government which robs Peter to pay Paul can always depend on the support of Paul. - George Bernard Shaw
Public opinion has most shallow eyes. - Euripides, "Medea"
All that is gold does not glitter,
Not all those who wander are lost; - J.R.R. Tolkien, The Fellowship of the Ring