This is idiotic.
#1: H.W. Bush was not particularly conservative, and neither was his son (who coincidentally made a ridiculously liberal appointment).
#2: If you are ridiculing the filibustering of Republicans (=/= conservative, remember), then what did you think of the infamous Bork procedure?
#3: What about Scalia is irrationally conservative? Sure, he's "conservative" by today's sense of the word, but that only affects his duties in the capacity that he does not attempt to actively "legislate" in the court. This is a genuine question, to which you might provide examples.
#1: Not even getting into a debate about what side either Bush was on. That's a flamewar waiting to happen.
#2: Bork was a laughingstock of an appointment "debate", and I use the term ironically. The Supreme Court in general has a history of completely stupid arguments about justice appointments, but that does not change the fact that in this case, it was talked about
even before the nomination. It also was in Bork, which was just as bad. This was a comment on the present case.
#3: As a sampling...
Edwards v. Aguillard: He dissented, wanting to uphold a state law requiring creationism ("creation science") to be taught in schools with evolution. The other judges struck it down because it provided only for christian creationism and no other available religious theories of the origins of man, thus clearly intended to advance one religion above others.
Romer v. Evans: He dissented, wanting to uphold a Colorado state constitutional amendment that would have prevented any legislative recourse for discrimination based on sexual preference. This amendment, had it been allowed, would have made it legal -- and unchallengeable -- to discriminate against gays specifically because they were gay.
Lawrence v. Texas: He dissented, wanting to uphold the Texas sodomy laws that basically made being gay a criminal offense. His argument was that the decision in Lawrence v. Texas would render other cases decided based on the previous ruling on the subject in Bowers v. Hardwick (which said the constitution did not protect sexual privacy) fall into question, which was bad.
Based on those and other, similar rulings, I consider Scalia pretty hard-right.