Didn't the folks on that mining colony became very chummy at the end of the episode with the Horta and her kids even though they lost of people (and a couple of red shirts) in the process?
True. But two huge factors probably changed their minds.
1) They had no idea whatsoever the Horta was more than an animal. The revelation that it was the mother of an ancient race probably changed their thinking a great deal. As for the fact that they had been destroying the eggs unthinkingly.
2) With the Horta offspring doing all the digging, the miners could sit back and simply get rich, without having to do much work or risk their lives in the mines (mining is always dangerous).
Lots of money changes feelings fast.