。
A real scientist probably wouldn't think that way.
Literal
True [possessive-の] scientist if that-way [topic-には] think not would-probably.
本当の科学者なら ('a real scientist would [...]') uses ~なら as an identity conditional. そんなふうに ('in that way') is the casual variant of そういうふうに — ふう ('manner, style,' written 風) is a noun denoting the style or way something is done. The tail だろう hedges the prediction into a soft probability rather than a flat claim.