What size tube will get the bends? If its .120 wall 1.5" tube then yes it will bend under a hard side load or a impact.
Can you build a tower off the axle to raise the mount up off the axle tube. This way you can use a straight chunk of tube and now just chunk of .120 wall 1.5" tube can be used without the fear of bending.
Or over build and use some .250 wall 1.5" with miter cuts and re-welded joints.
1993 YJ 4.0 60 Front, Rear steer 60, bolth spooled, 5.38's, 700r/241 39.5 iroks and beating it like it owes me money.