No they don't.
90% of none Shia Saudis don't even know names of 5 Imams. I have browsed some of Arab forums and have listened to some of their wahhabi speech on youtube, they don't use (ra) for Shia Imams when they hear or use their names. Some of them only use (ra) for Imam Ali and Hussain (PBUT).
Those idiots are proud of Abu Sufiyan (worst idol worshipper enemy of prophet Muhammad (PBUH) ), his son Moaviah (enemy of Imam Ali (PBUH) and his grandson Yazid (la) (enemy of Imams Hussain (PBUH) ). Those Nasibis even use (ra) for Yazid and know him as a righteous man!
Also in our Shia hadithes we have Sufianyi who is from Arabs (probably Saudia) and grandson of Abu Sufiyan and Yazid will be the last enemy of Imam Mahdi (PBUH) and will get killed by his fellows.
Yazidi schools in Saudia:
Saudi Wahhabis Name School In Honor Of Yazeed - Islam for Muslims - Nigeria
Imagine that Prophet Christ (PBUH) had a son and grandson and his grandson got martyred by a Roman man and today some "so called Christian" people exist that were proud of that Roman man. (Certainly if such people today exist we would call them Satan worshippers)
Now compare what I said with wahhabis and understand the wahhabi folly.