Why do anti-Christians even bother with shit like this? They always skew Biblical concepts into some perverted form of self-aggrandizement, and they never actually comprehend the concepts that they are judging others by. Furthermore, by judging others, you judge yourself, so I have no idea how these people do not realize that they are hypocrites.
I watched maybe three minutes of the video, and the only takeaway I got from it is that this guy has never actually read the Word of God. If he has read it, then he did not comprehend it. All of the concepts within the Holy Bible are interconnected to create a full comprehension, but you actually have to read the whole book to get this comprehension. Cherry-picking passages is like if someone were to go to Genesis 1:1, read, "In the beginning God created heaven..." and then claim that God is not real because He did not make the earth. If someone were to do this, you would probably call them retаrded, and you would tell them to read the full verse, which is, "In the beginning God created heaven, and earth." In like manner, you need to read the whole Bible in order to comprehend the interconnection of concepts within it—especially when it comes to prophecy.
Anyway, I have no idea what you mean that Christians cannot be conservative. I found the video more interesting than your question.