It's kind of like illegal aliens are criminals because they are ILLEGAL aliens.
We know homosexuals have some mental illness simply because they are homosexual. Homosexuality IS a mental illness.
I tried to be careful to distinguish that from other pathologies, as a different debate. This is why I also noted that it is very common for homosexuals to have physical complaints and defects that are clearly removed from their sexuality—but ironically are sometimes twinned with it.
And, I might also add that “illegal aliens” are not actually “illegal”, first because unlawfully crossing the border is only a prosecutable misdemeanor if you are observed doing it—it cannot be legally assumed, even though it is obvious that you had to illegally cross the border. And on top of that, unauthorized residency in the US is not a crime at all, it is a civil offense.
So the only true “illegal aliens” are individuals who have been banned from re-entry into the US. This is the one serious felony crime associated with unlawful entry or residence other than trafficking, and such banned people can receive up to a maximum 20 years in federal prison for that crime.