IGS is a very daunting and dare I say hostile place for genuinely new players. And yes, large PvP alliances have a bad rep among roleplayers, and typically for a reason (e.g. large scale harassment on/of RP channels). EVE is not the only game where this is true though, roleplayers are often treated with derision in almost any MMO by the "real players" (even though I've met very few people who do nothing but roleplay in MMO's, almost all PvP or PvE like everyone else). I remember RP-PvP realms in WoW being exceptionally bad about this in the past. Anyway, that is not to say there can't be some very good people in these groups - Ayallah, Arrendis come to mind first - but someone in such a group will have to work harder to prove themselves not a troll. I'm not saying it's fair, mind you.
As for the derision of Faction Warfare - again, IMO even in character it should be kind of a bad joke by now. It has gone on for years without anything resulting from it but tens of millions of lives lost, tying up resources and ruining economies of the planets in such zones, which probably weren't too robust to begin with. It honestly serves no sensible purpose other than to keep capsuleers busy, as it has often been called out for. In the more recent developments factions have again grown a bit warmer towards each other, the Sanmatar was invited to the Empress' coronation and he attended, without a huge fleet to protect him which shows more trust than just courtesy. The new Empress is expected to be also more inclined for peaceful relations, altough time will tell.
Out of character it is, to my understanding considered a PvP training ground for larger scale fleets and ops and indeed a good choice to cut ones teeth in terms of PvP if one is not ready to jump off in the deep end right away.
I know it also attracts budding roleplayers for visibility and ease of access reasons, and conflict is one of the more exciting and "easier" things to RP out, but it isn't the only way to get in to RP. When I started, FacWar was one of those things on CCP's Soon™ lists. What got me into RP was the backstory itself - four different, distinct human civilizations with no clue about their ancestry, 21,338 years in the future? Imagine the possibilities!
I don't mean to deride those who wish to RP and do FW, at all. It is as perfectly valid way to play as any. But I think it is also unreasonable to expect that those who have noticed how futile it is to not say anything about it. People have opinions, and different viewpoints. If someone thinks CONCORD Emergency Militia War Powers Act is still serving its purpose, and another thinks its just a load of hooey, neither of them is really wrong.
And to say once again - if a game has a lot of history, it is always daunting to jump in as a new player. I had the same feeling with WoW, and if I were to jump on board with EVE now, I'm sure i'd have the same with it too. Heck, I find EVE's RP scene daunting still even though I've been here for what, 11 years now?
What can I say to new players but to tough it out, don't rush it, get into it at your own leisure and pace that feels right for you. And have fun! There's loads of room for "silly" RP if you need a break from posturing.