Alex Greenwich said he didn't want to waste his time engaging with the one-time Labor leader turned One Nation MP's now-deleted tweet but admitted it affected him.
"It is extremely hurtful when there is a vile homophobic attack directed at you," the member for Sydney told ABC on Friday.
"It's not the first time this has happened to me ... that hurt, though, quickly turned into motivation to make sure we stamp out laws which allow my community to be discriminated against.
"Just as horrific as Mr Latham's comments are, the impact of current legislation in NSW is more horrific."
Mr Latham's tweet was posted in response to an article in which Mr Greenwich called the NSW One Nation leader "a disgusting human being" after LGBTQI protesters were targeted outside an event Mr Latham was speaking at.
"Disgusting?" Mr Latham wrote, before disparagingly describing sexual acts in graphic detail.
The tweet, posted shortly after 10am on Thursday, was deleted within a few hours but was shared widely by other users through screenshots.
Joining a wave of condemnation was Senator Hanson, who said she'd tried phoning the firebrand MP a few times asking him to issue a public apology.
"I want you to know I don't condone them (Mr Latham's words) and neither do my members of parliament or party associates," she told supporters.
Mr Greenwich dismissed Senator Hanson's intervention as "empty words", pointing to her recent motion in the Senate that "targeted the trans community".
"This is a party which is based on attacking different minority groups within our community, one by one.
"Sure, she's probably embarrassed by the content of what her state leader had said, but the actions she has taken have consistently been anti LGBT in the Senate."
Mr Greenwich said he didn't expect an apology from Mr Latham and didn't expect any recourse in the pair's workplace.
Mr Latham joined Senator Hanson's party in 2018. He was voted in again into the upper house in the NSW election on Saturday, giving the party three MPs in the 42-seat chamber.
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