You really shouldn't bother unless you are willing to admit that all parties, all campaigns and all elections are targeted by social media to gain votes.
Do that and its a discussion as to whether we as a society should allow it or not.
Bemoan because you lost rather than won because of it and its just sour grapes im afraid.
It's not just about the use of social media and use of data though. The link between Arron Banks, Farage, Bannon, Trump, Wikileaks, Alex Jones and Russia is massively troubling. The UK, USA and much of Europe is falling victim to some kind of Russian funded far right coup and nobody seems to give a toss so long as they get Brexit in return.