So the US government obviously has alot more info than me, and probably submitted direct evidence of the Chinese government controlling wechat and applying threats/ban/disappearance to the ovesea wechat users and their families in China.
And the judge looks at the fact that Chinese government, of which Pompeo just gave a speech on the future conflict between freedom and dictatorship, controls a crucial communication tool used by Chinese-born and American citizens in US and said the threat was....'modest'.