That would work the other way—with non-college educated people becoming more democrat. Instead, you see the opposite: college educated people becoming more democrat after historically favoring republicans, and non-college educated people becoming more Republican after historically favoring democrats.

Also, on the issues you mention (abortion and taxes) the GOP is more moderate than before. Trump is the first GOP candidate ever to oppose total abortion bans. He also was the first to take entitlement reform off the table.