Huh yourself. I'm sure you understand what it means that it was introduced and cosponsored by >100 Republicans, and what a veto-proof majority means. It was passed just a couple months before an election, it was pretty natural that Clinton would go along with it to avoid being attacked as 'soft on crime'.
How exactly is this not a Clinton bill? That's like saying the Affordable Care Act was not an Obama bill because he did not draft it. Just complete revisionism.
Sure...if you believe it's common for American presidents' signature legislation to be introduced by the opposition party and get 5x more support from them than his own party. It passed with 370 R to 37 D votes in the House and 84 to 15 in the Senate.