Why did the wall quickly reach half its height, according to Nehemiah 4:6?

Answer: The people had a mind to work

Despite the mockery, the wall was joined together up to half its height, "for the people had a mind to work."

“So we rebuilt the wall until all of it was joined together up to half its height, for the people had a mind to work.”— Nehemiah 4:6 (BSB)