but we know that

Who is we? And how do all of you know what you claim?

marginalized people

'Marginalized' is a loaded term. What would make them NOT marginalized? Being the majority or having disproportionate representation?

as a whole are overpoliced

How did you come to this determination?

so even police statistics are generally racist

This relies on your previous statement which I doubt

marginalized people being generally poorer and lacking the same opportunities and access to jobs, education, housing, etc, so the likelihood of someone being homeless or extremely poor and desperate is much higher for those that are marginalized

Well now you're changing your tune from your previous statement. Foreigners will necessarily be less established and struggle more than a native citizen. If these conditions mean that they are more likely to commit crime then doesn't it follow that they would (and should) be policed more often?

most crime committed by marginalized people disproportionately affect other marginalized people from their own community

This is the same for any group.

Is it possible that they just commit a disproportionate amount of crime? Not is it true but is it possible? If it is possible how would you determine that?

It sounds like you're trying to explain away the fact that subset of the population is responsible for an outsized portion of crime.