Controversial topics in mangas

So I was having an argument with someone who reads manga at my school, but I noticed the manga they were reading had a lot of.. Lolis in it. I asked him why he was reading it and he said he enjoyed it. So I tried explaining how that's a little weird and he got mad at me, saying "if there's rape in BL you don't care, but once I read something that has one loli in it now it's a problem"

I don't read BLs with rape in it so that didn't really effect me but I did USE to read it and that got me thinking.. Why is it so normalize for people to just brush past rape in BLs?? And most people who try to excuse it usually say "fiction doesn't effect reality" but yet they be the same people that say "fiction does effect reality" for shotacon and lolicon.

In my opinion I just think that all three subjects are just weird to read in general, especially if it's on a daily basis. But I wanted to see what other people think, "fiction does effect reality" or does it not?