ujm,
“the MO Jew telling a Chareidi that you cannot eat the food from my home since my keilim were used to make Cholov Stam food and/or I used my pots and pans, dishes and utensils with food products using hechsheirim that you hold isn’t acceptable. Therefore I’ll feed you with prepackaged food with a heimishe hechsher and I’ll serve it to you on paper good and plastic utensils.”
This is hachnasas orchim! The goal of feeding people is to make them feel comfortable.