The important thing to note is that sexual degenerates in general are a bunch of fucking snakes.
They will abuse any high ideal (freedom of speech/expression, or anything else listed in the bill of rights) to justify why they should be allowed to do what they do without shame. They will not only socially engineer people to tolerate/accept their degeneracy, but also attack anyone who is morally opposed to it, no matter how mildly or timidly.
It's true of furfags, troons, and of course, lolicons. No matter what kind of degeneracy it is, and no matter how much it was reviled or made fun of in the past.