Think about it. How was leftism introduced? Can you pinpoint when and how exactly it became the norm to dye your hair in all sorts of colors? Can you pinpoint when the left become so violent?
Can you pinpoint when degeneracy became so blatantly obvious in media?

Think media. Very few girls posted themselves half naked online, then it was hip, and now every other one does it?
Think males. It was okay to be masculine but now it's being framed as toxic to be who you are naturally inclined to be and now you're a nazi for being yourself?
Think the LGBTQABCDEF community. It was 2, then 3, then 4 genders, and now they're introducing pedophilia??

Normalizing behavior desensitizes those who are exposed to that behavior/content/etc.
Porn? Masturbation? Sedentary lifestyle? University right after high school? LGBT? Accepting mental disorders and not treating them? Depression?
People suddenly turning LGBT(tumblr, twitter, brigading leftie subs)? Remember we saw this recently in a study that says that a group of friends quickly becomes LGBT once a member turns https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0202330
People board the train and it's easy to introduce and change norms once the train takes off, all you have to do is slowly introduce them and then constantly bombard them. Think Syria and the US (wsj article)
The US has been involved in the middle east... all the time? It just became the norm to be involved in the middle east? Also take into account that all these countries have issues to worry about in their homeland, including but not limited to mass refugee immigration and drumpf.

The point I'm trying to make is that by employing the same strategies, we can introduce the masses to our ideology. People will joke about it but inside they will feel uneasy and the more they see it the further they are pushed to the other side.