The disagreement here is whether Buddhism is superior to any other religion. Every religion claims to offer a unique access to some truth. Most religions claim that they are the only way to this truth.
In this way, Buddhism is no different than any other religion. I can tell you that Christians say very much the same thing that you are saying (with a slightly different terminology). Jesus said that if you truly follow him "you will know the Truth and the Truth will set you free". The Apostle Paul said "for now we see only a reflection as in a mirror; then we shall see face to face. Now I know in part; then I shall know fully, even as I am fully known". This seems very similar to the quotes you made from Buddhism. It is not that surprising.
Of course, from within Buddhism it seems like Buddhism is a unique path to some hidden truth. I am only pointing out that in this way, Buddhism is just like every other religion.
I believe that religion is an important part of human experience, and Buddhism is part of this.
I don't believe that Buddhism is superior to any other religion.
It is because the teachings of birth and death do not exist within any of the other religions. It is because the teachings of impermanence and suffering do not exist within other religions.
The Abrahamic religions only profess heaven as the goal, but heavens still exist within samsara. They do not teach extinction of samsara.
Within the Abrahamic religions they spread ideas of murdering those who fail the commandments as justifying murder. It is inferior to teach such ideas.
They do not teach the fundamental reality. No where do they explain the nonexistence of self. No where do they teach the nonexistence of a soul. No where do they teach the aggregates.
They don't teach mindfulness of the breath method for examining reality. They do not teach the hindrances which lead to continued suffering.
Nirvana isn't a heaven or some paradise won by believing in a god. Nirvana is extinction from samsara. Heavens reside within samsara. All God's are subject to samsara. All heaven beings are subject to samsara.
The thing is all this can be verified. It isn't a dogma. It is true reality. Not something you just accept blindly. It is experienced.
Just like if you have never seen snow before. Where you live there is no snow so you have never heard anyone speak of it. But then one day a person appears and mentions snow to you. You would be perplexed. If this person just said, believe what I say, you might develope doubt that such a thing is true. But if that person taught you how to travel to a place where you can experience snow then you would know it is true.
Nothing within Buddhism suggests you should just blindly accept things said. It all can be verified as being true.
The point is you are not aware of the full extent of samsara. If I just talk about it, you will doubt such characteristics as being true. Your attachment for samsara will grow and you'll despise me for revealing the extent of samsara to you. Youll think such things can not possibly be true. "Its just religious nonsense."
The extent of samsara can be revealed. It isn't something that you are tricking your mind into believing.
Investigation is this method that reveals it is true. I gave you that method. You don't have to blindly accept any of it as true. The method will reveal it.