Why Expect Civility

Why would we expect civility from thugs? From a mob which has already shouted down a vote in an attempt to prevent a just law from passing?

It turns out that these thugs-for-abortion weren't planning on limiting their actions to merely shouting down another vote:

"DPS officials has been searching bags before letting people into the gallery, requiring them to throw away paper goods such as magazines, receipts, feminine pads and tampons. One DPS officer said authorities had been instructed by the Senate's sergeant at arms to confiscate anything that could be thrown from the gallery at senators on the floor. She said they had already found objects such as bricks, paint and glitter in bags.
Senate rules ban food, drink and some other objects from the gallery....
DPS officials confiscated one jar they suspected had urine and 18 jars they suspected had feces while searching bags of people entering the gallery, the department confirmed in a press release Friday afternoon."

Disgusting, but not ultimately surprising. After all, this is a group of people whose favorite slogans are "Keep the government out of my vagina!", "Keep your rosaries off my ovaries!" and "Hail Satan!" Really, this would be par for the course for a group which shouts down a state's legislature.