most of what you list above are not rulings he made but positions he took as an advocate when employed by the Reagan and Bush administrations. He has never written a judicial opinion about Roe. He has argued abortion issues before the Supreme Court as directed by his client, the US govt. During the confirmation for the federal appeals court, he said Roe was the law of the land and would be upheld. But as an appellate judge his job is to uphold precedents, not overturn them. Seems to me the abortion issue is an unknown. Arguments that he wants to overturn Roe assume his views are identical to his clients. Seems to me it's not wise to assume that. He may think Roe should be overturned, he may not. We need to find out his views on the constitutional basis for the Roe ruling during the confirmation hearings. I do know many of the possible Bush choices have been far more clear in their opposition to Roe and Civil Rights more generally.
There is a difference between believing something personally and one's view on the law. I personally believe abortion is murder but am strongly pro-choice. Someone can be a devout Christian or Muslim and still recognize a constitutional separation between Church and State.
Roberts reputation is that he revers the law and comes to opinions based on the law rather than imposing his own ideological views. Of course, how one sees the law is dependent on your own experiences. No one lives in a vacuum.
Here is an analysis of Roberts voting pattern on the DC Circuit court that I found through the Washington Post home page. I'm not familiar with the group so I don't know their ideological slant. A couple of weeks ago the WP had a very thorough discussion of various potential nominees. I posted that on DU then.
http://www.sctnomination.com/blog/archives/2005/07/roberts_place_o_1.html#moreThis links to the Post's SCOTUS coverage. Lots of other websites have analyses of the potential nominees.
http://www.washingtonpost.com/wp-dyn/content/linkset/2005/03/24/LI2005032400136.html