Tulsi Gabbard isn't anti-war. She explicitly called herself a hawk on the War on Terror. She's a right-wing opportunist, and like other right wing opportunists (Tucker Carlson, for instance) she might occasionally have a broken clock moment where she criticizes a war, but it's only because she wants to pivot to starting other wars elsewhere.
Tulsi is also a Zionist. She voted for a ban on BDS and called the protests antisemitic. In fact, she said that they were "puppets" of a "radical islamist organization" and, “I’m concerned about it because leaders in the West are not combating it. … Unfortunately, President Biden seems to be afraid to be called an Islamophobe.” This is similar to her criticisms of Obama for being insufficiently hawkish (in her view) on the War on Terror.
Don't fall for right-wing grifters trying to take advantage of anti-war sentiment to push their agenda.