Ronda Rousey is throwing her support behind Cain Velasquez following his attempted murder arrest earlier this week ... saying if the allegations are true, she "would have done the same thing" as the UFC legend.
The WWE star explained her stance on her social media page Thursday ... saying she doesn't blame Velasquez one bit for allegedly going after the man who was accused of molesting one of his close relatives.
In fact, Rousey -- whose husband Travis Browne lost to Velasquez at UFC 200 in 2016 -- said if she had been in Cain's position ... she might have done "worse."
As we previously reported, Velasquez was arrested on Monday in San Jose, CA. after he allegedly tried to kill Harry Goularte, a 43-year-old man who law enforcement says inappropriately touched one of Velasquez's family members at a child care facility days earlier.
In court documents, officials say Velasquez chased Goularte and his family members in his black Ford F250 ... rammed them, and then shot at them repeatedly, ultimately striking Goularte's stepdad in the arm.
Velasquez was eventually hit with 10 criminal charges, including felony attempted murder, over the incident ... and if he's convicted on all counts, he's facing decades behind bars.
After appearing in court Wednesday, Velasquez is slated to remain in custody until at least Monday.