His abortion views are to say the least, extreme.
That Shapiro's positions on abortion are seen as "extreme" and the explicit party platform position on abortion held by the Democratic Party is not is one of the biggest media coups of that last half century.
The polling shows that, despite what polling on the issue actually IS, the majority of people believe that the US is more pro-choice than it actually is. This can only be explained by what amounts to framing of the issue by the media to privileged the pro-choice position, as I cannot otherwise think of what can create such a disconnect.
When surveys on abortion are performed people tend to self identify at Pro-Choice vs Pro-Life at roughly even rate. Further, the STANDARD Democratic position that Abortion on demand with no restrictions is, in fact, a minority position that has roughly the same amount of support as the "no abortion ever under any circumstances" position. Further, of the majority of people who think abortion should be legal in some circumstances, a plurality falls on the more restrictive / fewer circumstances side, not the more open side, and further polling shows that among those who are dissatisfied with the current laws regarding abortion, again, most of that group want more restrictions, and further polling on when abortion should be restricted shows that, with a majority being fine with it in the first trimester, a majority being
oppposed in the second trimester, and a
supermajority being opposed in the third trimester.
So no, Shapiro is hardly an extremist on the issue of abortion, at least, no more than any of the Democratic candidates are extremists on the issue, as both are about as out of line with public opinion on abortion.
Basically, protip: if you believe in abortion on demand, at any time, for any reason,
you are an extremist on the issue in the same way a person who believes abortion should be restricted at all times, for all reasons.