In my many decades of being at these events, a number of them have people heavily imbibing strong drink hours before the meal. This has a habit of some people loosening their tongues and spouting off.
But many libs just can't help themselves....strong drink or no strong drink, they want to start something.
The “don’t proselytize!” many liberals have with regard to religion isn’t applied to their own belief system.
So them sharing their message is OK to them, but you sharing yours is somehow wrong.