Controversial matters are encouraged and should be at the forefront of this Stack Exchange.
If you are getting downvoted for asking controversial questions, while there is nothing that I can personally do to mitigate that, I will certainly vote and support your endeavour to bring it to the forefront. If you fear of getting banned because of how the vote system works [Which is reasonable], my personal advice is to:
Speak up, but without resentment.
My advice also when it comes to broaching controversy, is to do it with love and empathy for the persons you are addressing. If you do not fundamentally love and wish the people you are speaking to, the best in life, regardless of their disposition towards you or your interests, then your skepticism will come across as lacking empathy.