Why the hostility?

im trying to understand the mentality of white men and the colonial psyche. incomprehensible to demean n belittle another race based to differemt skin colour and culture. we started with islamophobia,black lives and now anti asia.is it something to do with education system,the mass media or xenophobic leaders? what cause one to hate another when they share common hope n aspiration in life,work hard,bring up a family. i still cant understand in this age of instant connectivity with anyone in the world,there is still prejudice n misconception? we view the other as a threat to our livelihood, their lifestyles as being extreme n radical n their behaviour as shameful n abnormal? So causes for potential hate based on racial discrimation.why cant we live together in harmony with others and the environment.we need the environment but the emvironment doesnt need us.perplexing existential conundrum