are you kidding? there wasn't nearly this much backlash for people making fun of the Obama girls? First, name one celebrity, comedian or writer for SNL or any other show that made fun of the Obama girls. If it happened, it was from some no name idiot in the comment section of an online article fawning over them. Hell, people were publicly shamed for not agreeing that Michele was the most beautiful woman in the world.
Edit: There was a GOP staffer who criticized the way the girls dressed and acted at a televised event at the White House on her FB page. there was a MASSIVE blowback over it and she lost her job immediately. She didn't even make fun of them, she criticized the 13 and 16 year old girls' behavior and attire which she thought was inappropriate for the White House. I'm not saying it's OK, it's not but it's quite a bit different from a celebrity and an SNL writer making fun a 10 year old on twitter. Plus, she probably has a lot fewer FB friends than Katie Rich and Julie Bowen have twitter followers.
Google "Obama girls criticized" and you get about 5 headlines for that story and one other that talks about idiots making inappropriate comments to an article on the FOX News website - not celebrities, not high profile venue, idiots in the comment section of a website. That's not a lot over 8 years. There is no double standard here - at least not the one you think there is.