The subject of "speaking in tongues" is quite controversial within the Christian community, with some embracing the phenomenon whole-heartedly, and others strongly opposing it.
Dying is an inevitable part of human life. The Bible reveals God's plan for all humanity that has ever lived, but it may not coincide with what you have been taught.
The passage in Colossians 2:16, probably more than any other in the Bible, is interpreted by those who reject God's festivals as confirmation that the biblical feast days are unnecessary observances.