"Today, this guy is turned into a non-citizen for "plotting" terror. Tomorrow, it will be some poor schmuck accused of "plotting" to picket an abortion clinic that gets tossed into a hole a buried." Abortion clinic protestors aren’t a clear and present danger to civilization organized and funded by a foreign paramilitary force that has declared war on us. Your analogy is unthinking. Your judgement is ludicrous.
And RICO only targets organized crime.