I understand anti-vac people are seriously misguided and are posing threat to others but has there been any ruling on this or Youtube just decided it doesn't like it?

I am of the opinion that this needs a transparent process so that YOUR rights are not stomped on when you are in minority. Say you we are transported back 200 years and you express an unpopular belief that black people should be made free and allowed to vote (and women too!) Who is to decide you are not allowed to even express your opinion because majority of the society thinks what you say is complete bullshit (why, who's going to do all this work?)