I feel like that's the whole point of the OP. I agree with the overall post but mentioning the ICE relationship seems to detract from the main point.

"I hate GitHub because X Y and Z features are bad" is a good reason to move away; "I hate GitHub because one of their thousands of enterprise customers does not align with my political views" is not, in my opinion.

For the record, I do not support ICE

That's why the article put that reason aside