For mass shaping tiktok is probably more effective, but Reddit probably shapes people more deeply, since there's actual discussion.
I think people are more critical in this discussion though, so that an apparent consensus may be interpreted by the user as the thread being bot-infested rather than there being a consensus. Thus it may be harder to get a result there, and the really interesting people that you may want to affect might actually be immune because they approach the medium as critically as it should be.
Also r/sverige r/sweden r/italy are very one sided. The right wing governments of those countries are finally now having some useless words about israel, but it will take a long time before the mods adapt.
/r/Sverige is absolutely astroturfed, but if you ignore the obvious astroturfers you can have real discussion there, because you won't be banned.
/r/Sweden bans people, but is less astroturfed and you can still have real discussion there, except when the drug-liberals (for Americans speakers, think drug-libertarians) and other goons come out of their hiding holes.
I don't think either subreddit cares about Israel stuff at all, and they certainly don't care about what any Swedish government thinks. In both, everyone gets to have their say, whether he's Israeli public diplomacy or Qatari public diplomacy, although bots will of course downvote, and Reddit itself will sometimes remove comments.
I think people are more critical in this discussion though, so that an apparent consensus may be interpreted by the user as the thread being bot-infested rather than there being a consensus. Thus it may be harder to get a result there, and the really interesting people that you may want to affect might actually be immune because they approach the medium as critically as it should be.