I think a lot of people are changing their minds on XT after the addition of blacklisting code.
Why didn't they just keep the Core code except add the block size upgrade?
Because XT developers are fulfilling government's mission to castrate bitcoin and change it to bring it in line with other payment methods.
Upgrading only block size with XT was never their only purpose. If this will go live we will have 'civil' version of bitcoin...