You're ignoring intent. The cloud was not a weapon or an aggressive act against anyone, destroying the cloud was an act of war.
How does what Crystal tell you all mutants were pushing the 'cyclops is hitler' narrative present in the universe? That's a dramatic slippery slope in logic. Show me where, on the page, it says the mutants have been using their resources to demonise all mutants and the x-men?
Because the Inhumans actually understand politics and optics, the X-Men don't, and they've failed at it since day one of their publication history. It's why they're always a hated minority because they suck at optics and PR. They save the world multiple times and aren't capable of spinning that into good PR in the eyes of the public. That's basic ineptitude. The Inhumans have been pushing the same line of co-existence the X-Men have but they're just better at it because they understand politics while the X-Men just cross their fingers that humanity are going to just start liking them.
Because her entire publication history has shown her incredibly capable at weather manipulation.
Storm who affects weather globally when she's slightly miffed.
It's a foregone conclusion she is capable of sending the cloud into space or changing it's molecular structure to disperse the terrigen.
How does ice cube = no cloud.
Inhumans care about the terrigen, they don't care if it's a cloud, an ice cube, a crystal.
I'm sorry, the Inhumans having Black Bolt shout at an illusion is somehow massively detrimental to the mutant species? How does that math work?
How does what Crystal did with the UN negatively impact mutants? She didn't make them think the mutants hate them, the X-Men did that, she just used it for politics.
So the short period they couldn't evacuate mutants from the cloud (because they were under staffed and held up my discount North Korea) outweighs all the mutants they evacuated in the follow 8 months? Ok.