Why did the Northern states want to keep the Southern states happy by not banning slavery in the Constitution?

Northern states didn't push too hard on slavery issues. Their main goal was to secure a new government. They feared antagonizing the South. Most of them saw slavery as a dying institution with no economic future.

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.  

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