@engineer,
Rabel is saying in essence that change is bad, because Trump is bad and Trump is changing things... It's a logically absurd position but I am not surprised at such change-adverse philosophy: the status quo is exactly what the so-called 'moderates' want.
In fact, if one maps US politics to European categories, Sanders is on the left, Warren is left of center, 'moderate' democrats are right of center (aka they are conservative protectors of the status quo), while the republicans are on the extreme right.