Cruz has a personal gripe with Russia because of the way the Communists abused his father. I detest Russia too, but Cruz is wrong. The enemy of the enemy is not our friend in this case.
Additionally, any weapon technology transferred to Ukraine will eventually fall into the hands of the Russians.
The current state of modern weapons technology in Russia is in a very sorry state. The Russians excel only in how much sex they have and how much vodka they consume. Why should the West give Russia our technology?
Crazy pro-Putin Jewish Russian emigrés who left Israel and moved to the west even deny the phenomenon of the lend-lease agreement back in WWII... They hold the ridiculous Russian attitude that everything was invented by Russians in Russia, and this despite how much the Jews in the West did for them in terms of helping them escape that hell hole. Ask them why they don't go back to Russia if it's so good, and they can't answer.