You have not proven that charitable giving is equal to altruism which is the belief and practice of disinterested and selfless concern for the well being of others.
Having the right intent and having no intent are two different things.
Charity/agape merely means to have loving intent. It does not necessarily mean you cannot have a selfish intent to seek your own happiness.
Altruism requires one to do something without any expectation of getting anything in return. Yet the very verse you point to illustrates that we reap what we sow and there is a correlation between how much we sow and how much we reap. So I don't think its wrong to sow more so that you can reap more. God wants us to sow with good intent, but I would argue selfishly seeking joy in God is part of that good intent.
The very fact that "God loves a cheerful giver" seems to indicate that he wants his followers to be seeking happiness in him as they go about obeying him. I don't think he wants altruistic robots do good for the sake of good.
Wow. You know with absolute certainty that if the biblical God does exist that what he does is totally random. That's quite a statement.In which case He is irrelevant. The "seeming" part is in your head and others that share your views.
The order in the world is self-evident. I don't even need to argue for it. If you cannot see it, than you are blinding yourself.Your first sentence is irrelevant and your second so general as to be pointless. What does "order in the world" actually mean, for example?
Remember: your god likes a cheerful giver.
Stay cheerful, Beefeater.
One last thought. Think about human relationships. Do you want someone to love you and to do good acts for you out of no self-concern? Personally I rather be in a relationship with someone who does good acts for me not only because it is the loving thing to do, but because she finds happiness in doing them for me.