One of the Dwarves says something. An Elf translates. "He said if it is about Amentan pollution policies the Amentan way of managing that concern of theirs is unconscionable and is not how we would handle a similar concern if we had one."

"...what are you going to do then?"

This gets translated. "He says if you mean what are they going to do about maintaining manufacturing standards in compliance with Amentan law, individual manufacturers can decide if it's worth the time and expense to, on their private property, prohibit contaminated persons and decontaminate materials and equipment. But that would apply only to those specific factories, and factories usually don't allow random people to wander around on their grounds anyway."

"What if they want to come here?"

"What if who wants to come here?"

"Clean Amentans."

"Then they can come here."

"Not if we've been - everywhere -"

"If they don't want to come here that's their business."

The reds look at each other uncertainly.

Everyone else settles into the tour car. "Are you worried about something?" asks an Elf.

"...the clean castes may be angry that we've touched things and they haven't been marked and cleaned or discarded," one says. "On a planet they might want to visit."

People look variously confused and irritated and upset. "And you expect they'll attack you?" someone says angrily. "For touching things that they might have wanted to touch?"

Reds spook when people look angrily at them and huddle closer together.

This gets them from angry to apologetic. "We're upset that people might hurt you, we're not upset at you."

"They - they don't expect to be surprised by things not being clean."

"Well, we can announce it to them when they approach the planet."

"They would be angry about traveling all that way and finding the place they went was not clean."

Locals glance at each other. Specifically the Ossiriand Elves and the Dwarves glance at the Doriath Elves. 

"Yeah," a Doriath Elf says after a moment. "That won't go well for them."

...the reds look between the parties present in puzzlement.

Dwarf says something. It gets translated. "Everyone who comes here is expected to be responsible for themselves and not interfere with voluntary relationships among other people. If someone comes here and can't follow those rules, they aren't welcome."

"But we're the ones who are unclean." They're still standing very close together on the plastic.

"They are allowed to not have a relationship with you. They are allowed to not have a relationship with us. They are not allowed to threaten people."

The reds are not sure about this.

" - is it just that you prefer not to provoke a war, even if you're in the right?"