It seems impossible to answer the thread question because we don't know what support the McCanns had eight years ago or what support they have now.
Initially they received a lot of support from the media, from certain well known people and from the populations of Luz and the UK.
The media support died away as more details became known, and when they became arguidos the media was mostly hostile. Then after several threatened libel actions the media became supportive again. Fair weather friends then, who will only be supportive when threatened.
The well known people who supported them have largely wandered off and are no longer heard about. They may be supportive or not, we don't know.
The population of Luz seem to think they are involved and just want the whole thing to go away.
The McCanns believed that Leicestershire police supported them until they were refused sight of the evidence held by that force, one of the reasons given being that;
"While one or both of them may be innocent, there is no clear evidence that eliminates them from involvement in Madeleine's disappearance."
http://www.mccannfiles.com/They had a lot of public support eight years ago with lots of money being donated to help them. Monetary support has declined over the years. We don't know if those people would donate again if the need arose.
Finally, there is support on the internet. Those who believe in the McCann's innocence proclaim it daily. They portray themselves as caring, empathetic, intelligent people who have considered all the evidence carefully before reaching their conclusions. In addition they daily castigate others who express doubt about the Mccann's version of events. They question their character and intelligence and accuse them of being cruel and vindictive, and of deliberately hampering the search for Madeleine. That shows that they don't inhabit the moral high ground as they try to claim because caring empathetic and intelligent people don't behave like that.