Since you seem so concerned about homosexual rights I'm surprised you are so quick to give someone else a ride on that slippery slide when its such an oft used criticism of homosexuality.
Except homosexuality is not a mental disease (and psychological experiments carried out a couple of decades ago proved it). Paedophilia however is.
But this guy isn't a pedophilia. You just think he is because he owns manga. You think that owning manga means he must want to fuck children. Thats the slippery slope.
Don't know about you, but I generally whatch porn with people I'd like to fuck. IF someone is sexually aroused by porn depicting small children, then that person is a paedophile. He probably had lolicon on his laptop.
Even if it was lolicon (we don't know) that doesn't prove anything.