After all these 7 pages, you've only had "because you should". But what is this thing you call worship? If you were to understand it, then you would see why you should do it. Can you define what worship is? You did touch on it here:
worship in the sense of building temples
singing and praising its name
So, do you think that if someone doesn't build a temple or sing and praise His name, that they are not worshipping Him?
Pretty much. I'll accept that there are activities equivalent to building temples or singing praises, but to me that sort of thing is what worship is.
It seems like needless hand-wringing when people start defining these terms to mean anything and everything. I was talking to a Christian friend just yesterday, and he said he believed that everyone had a god - except he was defining 'god' to mean 'the thing you hold highest'. To me, that's not at all what the word 'god' means. Gods are fundamentally concious, external, spirit-based beings, typically of unimaginable power and knowledge. That is what I think of when I hear the word 'god', and I'd wager that's what everyone else in the Anglophonic world thinks (or even a specific instance of such a being - Yahweh, Allah, etc).
So it also seems like hand-wringing to define 'worship' to mean 'holding something as highest'. Because then, under these broad definitions, we end up saying things like "I worship God, inasmuch as photography is the main thing in my life". To me, the two are completely different.
So ultimately this thread is about what
I consider to be worship. It never occurred to me that people might consider 'worship' so broadly (and, therefore, rob it of all utility). You're free to do so, of course, but it renders conversation moot.
Also, if they do build a temple, sing and praise His name, are they worshipping Him?
Usually. The scientist in me says "Ah, but what if they're doing it to, say, scam money or gain social clout?", in which case no, I don't think they would be worshipping God. So perhaps it's all about intent - they build temples and sing praises with the intent that this would be worship.
What is worship? What good does worship do? What harm comes from not worshipping Him? What harm comes from worshipping someone other than Him?
Indeed!