I was not aware of those claims by Maher and Hitchens. But, Obama has attended Christian churches for years and professes to be a Christian. I've hear a thousand people in my life claim that this or that person wasn't a "real Christian". Apparently according to whatever standards they've chosen to apply. I certainly haven't seen any evidence that he's a Muslim. Although I'm sure somebody's going to tell me he's a "sleeper Muslim" or something.
I'll take your word for that. But, it doesn't really have anything to do my point. Clinton hasn't been keeping the claim going for the last eight years. Conservatives of various stripes have, including the GOP nominee.
Where have those conservatives been the last eight years?
I don't doubt it. I don't recall any of those claims, but I heard a million cracks about Hillary being a lesbian and how ugly she and Chelsea were. Rush Limbaugh actually called Chelsea, who was 12 or so years old at the time, the White House Dog a few times. Some of my friends repeated that joke a lot. I was slightly right of center back then and thought it was classless and told them so. She was a kid for God's sake.
My memory isn't in your league, but I honestly don't remember wives and children of presidents being ridiculed very much at all before the Clinton administration. Of or by either party. It seems like things took a nasty turn in that regard around that time. It seems to have gotten progressively worse.