Ultimate truth is all powerful and all encompassing. I don't believe something can be true if in order to stay true it needs to remain inside a small bubble and after stepping out becomes wrong. The Buddhists in the hills can believe bubble truths all they want as long as they are protected by those who believe otherwise. They may believe that all you need is love yet need protection from the local police who realize that is ridiculous.
There is a myriad of truths in religion large and small that don't matter, and these strive successfully for a place in the hearts and minds of others. But the truth of God shines separate from others like the tiny pin prick in the sky; small as a mustard seed, completely different to it's surrounding, but indispensable. The truth of God isn't merely a bit better then others, or similar; it's completely different, the exact opposite. It is the stumbling stone, the corner stone, the rock of offense, the light in the darkness, unavoidable to the honest seeker.