And my comment there stands. It's gotten worse since then, instead of downvotes I simply get flagged and my content disappears. No point.
If you make a controversial claim backed up by sources, you will get negative reactions from people who doubt the validity of those sources. If you make a controversial claim and refuse to provide sources because people would doubt their validity, you'll get negative reactions even from someone who might have agreed with you, because that's just rude.