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 .