CT is a black orb that attracts and crushes anything inside. Naruto didnt die because Nagato wanted him alive to take his bijuu,or did you forget abt that?,nagato also said he would simply make a bigger one anyhow. He wanted to capture naruto,not kill him,hence his CT was to capture,not crush.
If hashirama gets sucked in,he will becrushed to pieces by he gravitational force,he wont even be able to move his body to make a forest if he gets pulled in,so yes,he will die once CT comes out,stone golems are not equal to the power of gravity,wood cant beat the gravitational force of CT.
This argument abt nagato unable to create moukton is getting ridculous,moukton is a chakra based kekkai gekkai,the trees are made from the users chakra,hence they are ninjutsu and is FOOD FOR PRETA PATH,the wood is made from hashi's chakra,hence will be absorbed easily. Also rinnegan can tell kage bushins apart IIRC,wood clones will be no different. Gedo would only hurt nagato if he is using soul dragon. And nagato possesed gedo when 7 bijuus were inside,his death came after hachibi and kyubi became the only bijuus not taken,hence he was in possesion of a gedo with 7 bijuus inside,which more than enought to pulverize hashirama, nagato has no need for soul dragon,hence he is in no danger. Hashirama is dead