At the time of Kennedy's presidency no one was still very nice to the Africans. The time of the Civil Rights movement was about to be at its peak and when when Kennedy did this speech he said it as in a way to say, "Hey, no matter what heritage you belong to or what your skin tone is, we should all be friendly to each other and help each other out." That was his way of asking for equality and the peace for the Africans. He wanted them to have the same rights as the white men had at the time. "Without regard to his race or color" meant that everyone that was different should still be together and not worry about that because it did not matter as long as they all agreed in a uniform idea that would be the best for the country and its people.
It means to "stay in a place longer than necessary, typically because of a reluctance to leave"
or
"spend a long time over (something), be slow to disappear or die"
Some themes for this could be a cliche like "All life is precious" and if you watch "The Walking Dead" on AMC, you know Morgan the actor refuses to kill humans because he believes they can change to good people. Another theme could be "All things deserve life"
At home stays the same
has left us with hope and fear
fear is now the norm
It means someone who identifies with being part of an emerging world community and whose actions contribute to building this community's values and practices.