> Why would we choose not to believe in Race? Isn't that promoting ignorance?

Not believing in things that aren't real isn't promoting ignorance.

> Where the author suggests race is 'learned' and that people are 'put into boxes', ignores that fact that chilren, having never seen people of other races, recognize the differences instantly, and ask questions as to why one person looks different than the next.

They ask that about visual differences between people who are ascribed the same "race" by the society, too. The division of certain differences as defining "races" and others as not racial is arbitrary.

> Rather than ignoring Races, we need to learn to celebrate race and diversity.

Celebrating diversity of cultural heritage does not requiring believing that races are real.