Exactly. Finding common ground, even with individuals that I disagree with, is essential.I think that depends. Think about gangs where in certain neighborhoods racism is an essential part of survival, it's not the norm but in these parts of society different = dead. Certainly an extreme example. But these are still even societies and cultures within our own.
Very different when discussing entirely different races. If earth were at war with mars ( assuming there are martians ) then that would mean one entire race of people at war with another race of "something" in that case, different then = dead. I think racism under that circumstance would be more understandable if not equally as sad.
The "general" racism on earth is a misnomer as we're one race but it's less understandable because we have so much common ground.
I think racism becomes less reasonable the more you find common ground and similarities.