They didn't criticize him because they had to interest in trying to make him look like a secret muslim.
I don't know how many Democrats wanted him to say it because I only found two. Gabbard and Manchin. So in other words I couldn't find any.
I don't care how many Democrats wanted him to say it, moderate Muslims who are seeking reforms within the religion wanted it said and they are the ones we should be trying to help.
How to Beat ISIS: Reform Islamic Teaching (Published 2015)
Two former jihadists say Islam needs to have a “candid conversation” about the connection between church teachings and modern Muslim terrorists.
www.nytimes.com
Maajid Nawaz
“There is no point in denying it. The statement that this has nothing to do with Islam is disingenuous. It’s as unhelpful as saying this is in essence Islam.”
“We need to have a candid conversation about this and recognize that there is a correlation between scripture and this. There are also geopolitical issues, yes — but there is also a relationship with scripture.”