The disciples expected that Christ would "come" as King, with a royal presence, and to remove the Romans and thrown down the corrupt temple, all at the same time and soon! It was a disappointment for them it turned not out that way, but they came to understand we could have an even much better future because of what Jesus had done. Though they also became convinced of the necessity to be prepared for the time that Jesus would return and that each believer could add by his effort of preaching, to bring the time closer.
It is striking that there are a lot of people in the world who are opposed to those who worship Jehovah as their only true God. The vast majority of those anti-Jehovah people come from extreme right-wing groups and fundamentalist or very conservative Christian groups.
When we look in the Bible at the infallible Words of God, Who does not tell lies, we can find that the God of Christ Who should be also our God, is One Singular Spirit Being Who is greater than Jesus and any other human being, also having lots of attributes which surpass those of man.
The Bible gives us a picture of the Only One True God His specific qualities and how He shows His faithfulness and His willingness to judge them righteous.
Some verses from the Bible to get to know the God of gods Who is an exclusive eternal Supreme Being Who is one (and not two or three) no man can see, and Who has a special or set apart (holy) Name, Jehovah.
Before calling a church or religious group a "cult" or "sect" one should seriously examine and clarify what one means with those qualifications.