These days, there is not much changed concerning opposition against the teachings of Jesus Christ and the preaching of Good News.
Always there have been real followers of Jesus who only worshipped his One God, the God of Israel. Many centuries they worked and preached behind closed doors, avoiding persecution and death on the balefire. In fear of the stake for centuries the real followers of God baptised people in their faith, not demanding to be part of one or another church but being part of the Body of Christ.
People should know that false teachers will teach anything they believe, and not from the Bible. People also should look at the preachers their behaviour and see if they have the Holy Spirit in them, following, living according and teaching the words of the Holy Bible. Often their way of talking, using a language which is not according the way Jesus would talk shall dismantle them and should be a sign for you that they are not the right one to follow.
In the history of Christendom we see many churches which started of as so called cults or so called heretic movements, though many years later they sometimes outgrew their original group and/or became one of the many main churches. Therefore one should be very careful by damning a group or calling ti a cult or sect, when there is not really anything what qualifies it to become called a sect or cult.
There are people who want us to believe god had to purify Himself but that we ourself do not have to do any works any more or can do whatever we want because God brought salvation to us by His death, though God can not die. By such misleading teaching those 'preachers' are fooling not only themselves but are taking the opportunity away for others to find the Real God of gods and the entrance to the Kingdom of God.
To come to a faith life of truth we will need a solid foundation. to explore the truth one is best to use a trustworthy book. It may look strange but there is a Book of books, containing 66 books by 40 authors which is literally of extraterrestrial origin.
Lots of people wrongly consider all those people using the Holy Name of God (Jehovah) to be members of the North American Organisation Watchtower Bible and Tract Society Organisation.whose members are best known as Jehovah's Witnesses. Though people should know that there are lots of other organisations also witnessing for Jehovah but not belonging to the millenarian restorationist Christian denomination with Non-Trinitarian beliefs, best known for their door-to-door preaching, distributing literature such as The Watchtower and Awake! Lots of groups direct their poisonousness arrows on them and like-minded people, having us as different Non-Trinitarians showing there are lots of Non-Trinitarians or real followers of the Biblical doctrines and lovers of Jehovah, the Only One True God.