If liberals are oppressed in America....why don’t they move to Iraq or Afghanistan ?

Same reason you don't. 

POC privilege is real in America. Oakland mayor just announced that they are giving 

$500 checks to low-income families - but not if they're white 

But when oppressed people from South and Central America come here you cry about it.

I've had the displeasure of living through eight presidents including the AIDS crisis that Ronald Reagan ignored, if the answer you choose when someone brings up problems in a first world country is that least it isn't as bad as a third world country then your first world country isn't all that great.  It's like a mentally abusive parent scolding their child by telling them 'least we love you and don't beat you like other parents'.