They have it all backwards (John 16:19-20)

Now Jesus knew that they desired to ask Him, and He said to them, "Are you inquiring among yourselves about what I said, 'A little while, and you will not see Me; and again a little while, and you will see Me'? Most assuredly, I say to you that you will weep and lament, but the world will rejoice; and you will be sorrowful, but your sorrow will be turned into Joy.  John 16:19-20

Talking to one of my daughters can be difficult at times.  She thinks she is speaking in full, likely well designed, sentences... but she is not.  They are sometimes void of context and/or missing key words.  Jesus is not mincing words here.  He is speaking clearly.

The world rejoiced at His death and His followers did mourn.  But praise be to God that our hope is built on the cross-work of Christ.  The very instrument of pain and death used to bring about the satanic mission of the enemy, brought us life and peace with God through our Lord Jesus Christ.  

AMEN!!!

So go ahead and praise Him... even if you don't use full sentences, He knows what you mean.  :)

Cheers.