Is there anything legal that can be done about the MAPs community on Tumblr(NSFW, details inside)

This question mentions pedophiles so if that’s an upsetting thing for you, be warned

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There is a Tumblr community called MAPs (Minor-attracted people) which, you guessed it, are pedophiles. My friend told me about this community and I looked into it (very briefly, it was upsetting) and I want to know if anything legal can be done about it, or if emailing Tumblr about these accounts would change anything.

One account is a person who says they are 21 and talks about having a crush on a 12-year-old.
Another account is a 22-year-old who admits to being a pedophile and admits to having crushes on 6-year-olds.
I feel that some of these accounts might be fake and trolls, but there’s so many it’s impossible that they are all trolls.

This community says that they are “no-contact” pedophiles, meaning they don’t actually touch kids, just fantasize and crush on them. They defend pedophilia, saying it’s not wrong to be attracted to kids as long as you don’t touch them. They want the age of consent lowered, for it to be normalized, and for their attraction to be apart of the LGBT+ community as “Pedosexual”.

Obviously, this is very disgusting and upsetting. Is there anything legally that could be done and would emailing Tumblr to monitor/moderate these people do any good? I know free speech is a thing, but this can’t be something that’s allowed. It’s absolutely disgusting.

Also, these people claim that child porn is good because “it helps prevent them from touching kids”.
They feel that normalizing this will prevent them from touching kids because it helps them get support and help.