We see this nature more in political leaders. A politician belonging to a party may be a big rival to another politician in another party. So they criticize each other very heavily and try their best to get a bad name to him. But after death of one of these two politicians the other politician will appreciate him and say that he is the best politician he had ever seen. This is a very common phenomenon in politics. In AP, Chandra Babu Naidu and YS Rajasekhar Reddy were never in good relations. But after the death of Reddy, Babu appreciated him and mentioned many good deeds he did.
"Time & Tides waits for none"
" Be Good and Do Good "
K Mohan @ Moga
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease
Knowledge is power.
Also as common people, we praise dead people as it is against manners to speak ill of them.
Why we have this trend in our society, should be changed.
'Mastering others is strength. Mastering yourself is true power'. -Lao Tzu