I get that the idea was horrible but calling a seed name racist 150 years later and asking a bank to drop it seems extreme. Before I'm labeled a racist or native American hater, I spent 4 years working with Running Strong For Native American Youth during my winter break from college in South Dakota on reservations delivering mattresses to kids that had asked for them for Christmas because they were sleeping on dirt floors. I've seen up close and in person how crappy reservation life really is. I just think we get too easily offended by names. I grew up in DC and if I got offended every time I was called a bad name I would have had a rough life. Hopefully I didn't offend anyone, I know it's a sensitive issue. If I did it was unintentional.
While I agree it's a little strong to call the name outright racist (I'm sure the founders are just clueless and thought it sounded cool. I mean, their logo is am exploration era ship, which being that Manifest Destiny refers to the land based expansion of the US towards the west is a bit of a disconnect to begin with) it's still a really tone deaf and terrible name for a company. There's no other industry where that would fly, it's just cannabis breeding is still flying enough under the radar that they can get away with stuff like that. Personally I've just chosen not to purchase anything from them. I'm sure I'm not alone, so from a business perspective alone they should probably consider changing their name.
As for whether or not DC Seed Exchange should drop them, that's a more nuanced discussion. Due to the absolutely atrocious education system in the US, I'm sure most people just have no idea how offensive the term can be. I mean, I grew up in an extremely liberal area and I remember Manifest Destiny was taught as a good thing, because it was the beginning of the US becoming established as a world super power. The fact that it was driven by Westerners belief that they had a God given mandate to subjugate and convert the Native Americans and spread Christianity and the "rule of law" west from the original colonies and across the entirety of the country was largely glossed over. Probably still is being that my kids curriculum doesn't appear much different than mine was.
I'm actually going to ask my teenager if she knows what Manifest Destiny even is now that we're talking about it. Something tells me I know the answer, and it will make me sad.