How do you think science can disprove the existence of Yahweh?
The answering of prayers, for one. Favouring Christians, for another. Returning within the lifespan of the apostles, for another.
These are not really science, except for the first. Unfortunately for you, all the scientific experiments done so far have shown that intercessory prayers are answered. Even the study by Benson et al. found that the prayed-for group had less
serious complications than the non-prayed for group. And that was in a study that was flawed in that it really didn't have the statistical power to detect a small difference. The difference there was large enough to overcome the flaw.
So, if you are going by your view of science, in this case science has "proven" the existence of God!
However, because of limitations of science, the studies do not show that
God answers prayers. What it showed was that intercessory prayer has an effect. They did not test the mechanism by which intercessory prayer worked. Thus science remains agnostic -- to the great relief of atheists everywhere.
It does appear that Jesus did promise that the end of the world would come in the generation of the apostles. Paul thought so. The failure caused a crisis within the early Christian Church. There are several hypotheses to explain the supposed falsification. (This is permitted in science. You can propose ad-hoc hypotheses to save a theory from falsification. The criteria is that the hypothesis needs to be tested
independent of the theory it is trying to save.)
There is nothing I can find that God will
favor Christians. Instead, belief in Christ is one sure way to find God. Some Christians have professed the belief that God favors them (particularly the new "wealth" theology), but indeed this has no theological support.