"And all I'm saying is that it, therefore, cannot be rational to believe completely and exclusively that there cannot be a god."
I think that beliefs can be wrong. Beliefs not predicated on evidence of an empirical nature generally are. I believe that it is totally rational to believe that there cannot be a god if we follow the inductive process of science. I believe that gravity can't be repealed and I believe that the "big bang" probably caused the universe. I believe this because a reputable amount of scientists have been active in proving this.
The insistence of those who are believers that those who are not are irrational is in itself a logical fallacy. There is no scientific proof that a teleological, comosological or ontological god exists. That in itself should give pause to those who claim otherwise.
Now anyone can believe anything they like. Can they prove it? Scientists can by replicating experiments that consistently come to the same conclusion. I believe that scientists would do well to challenge and investigate any religious premise made and that if they were to do this, society could be improved, wars could possibly end and rational thinking might prevail to keep us from being at each other's throats.
As to the issue of abortion, no feeling or compassionate person thinks it's a great thing to do and some of us think that at times it is necessary. It has been shown to save the life of mothers, keep unwanted children from sociopathic growth, control an out-of-control population and create a psychological relief for people too young to assume the responsibility of parenthood. It is not a preferred thing to do, however, and is painful to observe. I have had that experience of observation.
To the subject of respect, I take my cue from Professor Richard Dawkins who in his lectures to believers and non-believers alike always shows courteous respect to them as people while unequivocally rejecting those ideas that he feels are flawed. I can't respect all ideas but I can respect the people who present them without being rancorous or vindictive or attacking anyone.
So whether you believe in a god, think abortion is evil, follow a dictum of a church or whatever, I may not respect your conclusions but I do respect you as a human being. Even when a person's actions are to be found reprehensible, I think it's fine to criticize that behavior bearing in mind that we are all essentially highly evolved compared to the protozoa from which life emanated and that in itself deserves respect.