I'm sorry but the way you have worded this question doesn't really make sense to me. I have a strong belief in God, but I am absolutely incapable of turning that belief into reality. It already is reality to me, and I couldn't possibly turn it into reality for you.
Oh, I am very, very much prepared to act on my beliefs. As a matter of fact, I do so every day.
Okay, but remember, my question to you was, "Why on earth are my beliefs of any concern to you whatsoever?" You may consider my beliefs to be irrational or foolish, but they certainly cannot be said to be hateful or harmful to anyone. If they are merely irrational or foolish to you, why are you concerned about them? (Obviously, if they were hateful, that would be a different matter.) You see, in my opinion, lack of belief in a Higher Power is both irrational and foolish, but since it is not inherently hateful, I say, "To each his own."
Well, since this is the anniversary of 9/11, I'd ask you to remember that people do act on their beliefs, each and every day. Proposition 8 in California sought to deny certain rights to people that many people "believed" should be deprived of them. And they won. The Puritans of Salem Massachusetts believed that some women (and a couple of men) were witches -- possessed magical powers -- and ought to be killed. And they killed them -- without, apparently even noticing that these alleged "magical powers" were simply incapable of providing these poor wretches any protection at all.
Our history, and our present, and very likely our future, are and will be all filled with examples of people acting on their beliefs.
Sometimes, these beliefs are benevolent, and do some real good. Sometimes, they are well-meaning, but do great harm. Missionaries, in an effort to convert other cultures and religions to their own beliefs, have on too many occasions destroyed those cultures. My belief system says that destroying whole peoples is NOT a good thing, and I think that I should act on that belief.
In my own country, Canada, churches raised lots and lots of money from their well-meaning congregations to fund a "Residential School System," dedicated to
legally stealing native children away from their own families, and raising them with the important mission of "taking the Indian out of the child." Many, many died. Many by their own hand. Many turned to prostitution, alcohol and all manner of other social ills. Misery on a horrible scale was the direct consequence of these "benevolences."
I'm a gay man. There are many people around the world who believe it would be right to kill me. There are countries that will happily oblige, through their legal systems, sustained as they are by "belief," rather than knowledge.
So people, in their hundreds, thousands, hundreds of thousands and million have been, are being and will be killed, enslaved, brought to wrack and ruin -- because of beliefs. And yes, a few people might be helped. I put it to you, however, that the benevolent beliefs of some, who set up hospitals, or charities -- have throughout history provided considerably less in the general well-being than beliefs that other people have the wrong beliefs, or "should be more like us," have a great deal more harm.
Yes, I think taking an active interest the beliefs of others – especially when they are not backed by a solid foundation in reason or knowledge of human nature, or respect for the beliefs and rights of others – is pretty important.