What would you have expected his call turn /fold river range to look like on blanks?
AA/KK/QQ/JJ with or without a diamond,
x maybe
Jx. Not saying he'll always play these this way, but it's pretty conceivable he'll 3bet pre with JJ-AA, bet flop, check call a shit turn card (esp if he has a diamond) and fold river when he beats nothing. Possible he'll call
x on the turn and fold river unimproved too. QJ is v optimistic but so are the spanish so not ruling it out...