The problem with MacArthur's words here is centered on the unnecessary and incorrect slam he levels against his Reformed brothers and sisters in Christ.
Just like the "hyper" straw man, I know of NO CALVINIST who believes like the opposition says we believe. To say so, however, just makes it easier for them to criticize the Reformed faith.
As MacArthur writes...
"Pink was attempting to make the crucial point that God is sovereign in the exercise of His love. The gist of his argument is certainly valid: It is folly to think that God loves all alike, or that He is compelled by some rule of fairness to love everyone equally. Scripture teaches us that God loves because He chooses to love (Deuteronomy 7:6-7), because He is loving (God is love, 1 John 4:8), not because He is under some obligation to love everyone the same."
All Calvinists believe the sun shines on the saved and the reprobate. And all Calvinists believe that God's "love" ends there for the reprobate, and God's "love" extends to the elect as eternal bliss with Him in heaven.
No small difference.
MacArthur errs in his next step by denouncing Pink as "going too far" when Pink and MacArthur both agree that God saves according to His decree and not the will or whim of men. MacArthur simply wants it both ways.
"Unfortunately, Pink took the corollary too far. The fact that some sinners are not elected to salvation is no proof that God's attitude toward them is utterly devoid of sincere love."
"Sincere?"
"The Son of man goeth as it is written of him: but woe unto that man by whom the Son of man is betrayed! it had been good for that man if he had not been born." -- Matthew 26:24
MacArthur is courting the TV audience now. Too bad.
I do not think his doctrinal position is so far outside what most of us accept as truth , (recognizing a general love that God has for all his creatures)
The issue is closer to your words here.
That was an Ad Hominem attack that was completely unnecessary unless it WAS his primary point.
Maybe he has a book coming out "The Purpose Driven Salvation"