sweetie nice

I am not fond of sarcasm, but Isaiah 41 caught me so off guard that I laughed out loud. What is this? God......God speaking....God? being sarcastic?

Produce your cause, saith the LORD;
bring forth your strong reasons, saith the King of Jacob.

Let them bring them forth, and shew Us what shall happen:
let them shew the former things, what they be,
that We may consider them, and know the latter end of them;
or declare Us things for to come.

Shew the things that are to come hereafter,
that We may know that ye are gods:
yea, do good, or do evil, that We may be dismayed, and behold it together.

Behold, ye are of nothing, and your work of nought: an abomination is he that chooseth you.

POW. Yikes!. Wow.

I was brought up sweetie nice. We say nice things to each other because we are nice people and especially because we are nice Christians. Words that are not nice are not good.

What else have I missed in His Word simply from the fact that I thought everything has to be nice and what I was reading could not possibly mean what it seemed to be saying?