Instead of doing that, how about we have laws against killing people, and then actually enforce them? "Where is the line" for how much we should "tolerate into

Instead of doing that, how about we have laws against killing people, and then actually enforce them? "Where is the line" for how much we should "tolerate intolerance" is a very easy question to answer. The line is at current, US law. Break the law with your intolerance, via engaging in violent assault, and you should go to jail.