>>Bluntly, Shopify clearly thinks it's OK to not sell their software to people who might express ideas they don't approve of.

Sure, as they should have a right to. If they chose to not sell to Biden's campaign they should also be free to do so.

>>By extension, they're also maligning half of America as either too stupid or immoral to have good reasons for voting for Trump.

Your extension is so wild it not only extended past this conversation, it left this solar system. Are you projecting your own beliefs?