The PATRIOT Act was introduced by a Republican and signed into law by a Republican and had wide support from both parties. 62 Democrats and 3 Republicans voted against it in the House (there was only a single senate vote against it), and you can't have a discussion about the Patriot Act's introduction without bringing up the fact that it was enacted at the height of the post-9/11 fear. It has always been a controversial and flawed bill.
Most of today's social issues aren't about left versus right, they are about class.