Superb demonstration of the problem.
Representative democracy, or a republic, is a way to meet the needs of several constituencies through compromise. No one group rules.
And yet Republicans, as you note, think it's normal and usual to ignore the needs of others in order to get their own way. As you point out, getting their own way is more important than the welfare of the country and anything, no matter how damaging. Terrorist tactics are "fair" and necessary, only they somehow aren't "terrorist" when used by Republicans. No compromise. A lock-step party organization reminiscent of some historically recent dictatorships.
That's not democracy. That's not what America was created to be.