“So Ted Cruz is responsible for what Geo. Bush did in his campaign....really!!!”
No, it means Ted Cruz was responsible for what Ted Cruz did during his time with the Bush campaign and the Bush Administration, advising and preparing policy positions for Bush to approve, which enabled illegal immigrants to remain in the United States.
Wikipedia:
Bush administration
Cruz joined the George W. Bush presidential campaign in 1999 as a domestic policy adviser, advising then-Governor George W. Bush on a wide range of policy and legal matters, including civil justice, criminal justice, constitutional law, immigration, and government reform.[47]
Cruz assisted in assembling the Bush legal team, devising strategy, and drafting pleadings for filing with the Supreme Court of Florida and U.S. Supreme Court, in the case Bush v. Gore, during the 2000 Florida presidential recounts, leading to two wins for the Bush team.[43][50] Cruz recruited future Chief Justice John Roberts and noted attorney Mike Carvin to the Bush legal team.[48]
After President Bush took office, Cruz served as an associate deputy attorney general in the U.S. Justice Department[4][50] and as the director of policy planning at the U.S. Federal Trade Commission.[4][39][50]