If everyone is a result of their circumstances as the left claims (and as much of the research claims) then be the change of those circumstances you wish to see. Expose these people to the thinking and information you believe to be so transformative and true

And all you've done is demonstrate that you don't understand what the left is fighting for. We are (probably the only ones) fighting to change the circumstances. Those benefiting from those circumstances, aka the capitalist, white supremacist, patriarchal, ableist, cis-heteronormative status quo, even if very mildly, being uncomfortable is a tiny price they're just going to have to pay, because prioritising the their personal comfort over change is how we got here in the first place.