Why complain about the sliver of Americans who take anti-imperialist positions because you view it as... a slippery slope into unconditional support of reactionary governments? You've got plenty of Americans who are more concerned with your country as a source of Poison Blood.
Our creditors, international electoral & financial organizations the EU+US+Japan+SK has dominance over, & our military training, aid, & intervention are what have amplified reactionary currents in Latin America. Not the PSL. You're tilting at windmills.
Feel free to be more specific with your actual grievances against these organizations.